TEDS Data Dictionary

Variables in the 9 Year Dataset

The table on this page lists all 9 Year variables. This includes all item variables from the 9 Year booklets, as well as derived variables that are based on 9 Year items.

The table does not include background variables that originate from other sources (either from admin data or from other study datasets). Such variables include IDs, twin sex and zygosity variables, the random variable and general exclusion variables. See the background variables page for details.

Variables are listed in alphabetical order in the table below. The columns of the table are:

Dataset variable name
Dataset variable label (in SPSS)
Source of data:
- child - from the twin booklet
- parent - from the parent booklet
- teacher - from the teacher booklet
- admin - administrative data, logged in the TEDS admin database
Item or derived variable? - see item coding for the parent, child and teacher booklets (pdfs) for item variables; see also the description of derived variables for more information.
Data type:
- integer - numeric whole numbers
- decimal - numeric with fractional values
Variable type:
- nominal - categorical, with arbitrary numeric values
- ordinal - categorical, with ordered numeric values
- quantitative - numerical measurements of some concrete quantity such as age
- scale value - numerical measurement derived (usually) as a sum or mean of other variables
Coding or range of values - this shows the value coding used for nominal/ordinal variables, or an approximate range of values for quantitative and scale variables.

dataset variable name	dataset variable label	source of data	item or derived variable?	data type	variable level	coding or approximate range of values
iadults	Household category: adults present (parent at 9), see value labels	parent	derived	integer	nominal	1=biological mother and father, 2=mother or father with guardian/other, 3=single parent, 9=other or unknown
icbpimp1/2	Being a parent: parent gets impatient (child at 9), see value labels	child	item	integer	ordinal	0=never, 1=sometimes, 2=often
icbphap1/2	Being a parent: happy about parent relationship (child at 9), see value labels	child	item	integer	ordinal	0=never, 1=sometimes, 2=often
icbphapr1/2	Reversed version of icbphap, see value labels	child	item	integer	ordinal	0=often, 1=sometimes, 2=never
icbpamu1/2	Being a parent: parent finds me funny (child at 9), see value labels	child	item	integer	ordinal	0=never, 1=sometimes, 2=often
icbpamur1/2	Reversed version of icbpamu, see value labels	child	item	integer	ordinal	0=often, 1=sometimes, 2=never
icbpalo1/2	Being a parent: parent wishes I would leave alone (child at 9), see value labels	child	item	integer	ordinal	0=never, 1=sometimes, 2=often
icbpang1/2	Being a parent: I make parent angry (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icbpclo1/2	Being a parent: I feel close to parent (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icbpclor1/2	Reversed version of icbpclo, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icbpfru1/2	Being a parent: I make parent frustrated (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccacce1/2	CEQ Acceptance (child) mean scale at 9, 0-2	child	derived	decimal	scale value	0 to 2
iccadve1/2	CEQ Adventure (child) mean scale at 9, 0-2	child	derived	decimal	scale value	0 to 2
iccas011/2	Behaviour: important to fit in (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas01r1/2	Reversed version of iccas01, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
iccas021/2	Behaviour: odd way of talking (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas031/2	Behaviour: have unusual interest (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas041/2	Behaviour: focussed on myself (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas051/2	Behaviour: conversation difficult (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas061/2	Behaviour: same interests as friends (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas06r1/2	Reversed version of iccas06, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
iccas071/2	Behaviour: nervous habits (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas081/2	Behaviour: easy to remember facts (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas091/2	Behaviour: say rude things by mistake (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas101/2	Behaviour: I like to talk about (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas111/2	Behaviour: others cannot follow me (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas121/2	Behaviour: like to stick to routines (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas131/2	Behaviour: do things over and over (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas141/2	Behaviour: like stories (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas14r1/2	Reversed version of iccas14, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
iccas151/2	Behaviour: show other people (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas15r1/2	Reversed version of iccas15, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
iccas161/2	Behaviour: difficult to look in eye (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas171/2	Behaviour: get on with other children (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas17r1/2	Reversed version of iccas17, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
iccas181/2	Behaviour: other people important (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas18r1/2	Reversed version of iccas18, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
iccas191/2	Behaviour: care what friends think (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccas19r1/2	Reversed version of iccas19, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
iccas201/2	Behaviour: get wrong end of stick (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iccascomt1/2	CAST Communication scale at 9 (child self-report), 0-12	child	derived	decimal	scale value	0 to 12
iccasnont1/2	CAST Non-Social scale at 9 (child self-report), 0-12	child	derived	decimal	scale value	0 to 12
iccassoct1/2	CAST Social scale at 9 (child self-report), 0-16	child	derived	decimal	scale value	0 to 16
iccastt1/2	CAST overall total at 9 (child self-report), 0-40	child	derived	decimal	scale value	0 to 40
icchaos11/2	Chaos: regular bedtime routine (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icchaos1r1/2	Reversed version of icchaos1, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ichaos21/2	Chaos: cannot hear yourself think (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichaos31/2	Chaos: a real zoo (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichaos41/2	Chaos: able to stay on top of things (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichaos4r1/2	Reversed version of icchaos4, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ichaos51/2	Chaos: usually a TV turned on (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichaos61/2	Chaos: calm atmosphere (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichaos6r1/2	Reversed version of icchaos6, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icchato1/2	Child Chaos scale at 9, 0-12	child	derived	decimal	scale value	0 to 12
iccla011/2	Classroom: like to be (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla021/2	Classroom: accepted by other children (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla031/2	Classroom: work will help in future (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla041/2	Classroom: feel upset (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla051/2	Classroom: work is interesting (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla061/2	Classroom: friends care about work (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla071/2	Classroom: teacher takes an interest (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla081/2	Classroom: feel unhappy (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla091/2	Classroom: get on with other children (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla101/2	Classroom: have a lot of fun (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla111/2	Classroom: get excited about work (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla121/2	Classroom: will help in 2ndary school (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla131/2	Classroom: feel lonely (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla141/2	Classroom: teacher treats me fairly (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla151/2	Classroom: like to do extra work (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla161/2	Classroom: friends try their best (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla171/2	Classroom: teacher helps do my best (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla181/2	Classroom: feel worried (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla191/2	Classroom: learn things I care about (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla201/2	Classroom: friends enjoy learning (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla211/2	Classroom: teacher listens (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla221/2	Classroom: feel happy (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla231/2	Classroom: people think a lot of me (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla241/2	Classroom: learning will be useful (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla251/2	Classroom: proud to be a pupil (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla261/2	Classroom: friends often in trouble (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla271/2	Classroom: popular with other children (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccla281/2	Classroom: learning is fun (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iccnega1/2	CEQ Negative Affect (child) mean scale at 9, 0-2	child	derived	decimal	scale value	0 to 2
iccoppo1/2	CEQ Opportunity (child) mean scale at 9, 0-2	child	derived	decimal	scale value	0 to 2
iccpeer1/2	CEQ Friends/Peer Context (child) mean scale at 9, 0-2	child	derived	decimal	scale value	0 to 2
iccsati1/2	CEQ Classroom Satisfaction (child) mean scale at 9, 0-2	child	derived	decimal	scale value	0 to 2
iccteac1/2	CEQ Teachers (child) mean scale at 9, 0-2	child	derived	decimal	scale value	0 to 2
icdata1/2	Child booklet data present at 9, 1Y 0N	child	item	integer	nominal	0=no, 1=yes
icdiask1/2	Discipline: parents ask someone else (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icdiexp1/2	Discipline: parents explain (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icdiexr1/2	Reversed version of icdiexp1, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icdifir1/2	Discipline: parents are firm (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icdifrr1/2	Reversed version of icdifir1, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icdijok1/2	Discipline: parents make a joke (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icdisavot1/2	Parental discipline avoidance scale, child-self-rated, 0-4	child	derived	decimal	scale value	0 to 4
icdisho1/2	Discipline: told off or shouted at (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icdisma1/2	Discipline: smacked (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icdisnegt1/2	Parental discipline negative/harsh scale, child-self-rated, 0-4	child	derived	decimal	scale value	0 to 4
icdispost1/2	Parental discipline positive scale, child-self-rated, 0-4	child	derived	decimal	scale value	0 to 4
icg1/2	G composite (9 year child), standardised	child	derived	decimal	scale value	approx. -3 to +3 (standardized)
icgen011/2	General Knowledge Quiz item 1 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen021/2	General Knowledge Quiz item 2 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen031/2	General Knowledge Quiz item 3 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen041/2	General Knowledge Quiz item 4 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen051/2	General Knowledge Quiz item 5 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen061/2	General Knowledge Quiz item 6 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen071/2	General Knowledge Quiz item 7 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen081/2	General Knowledge Quiz item 8 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen091/2	General Knowledge Quiz item 9 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen101/2	General Knowledge Quiz item 10 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen111/2	General Knowledge Quiz item 11 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen121/2	General Knowledge Quiz item 12 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen131/2	General Knowledge Quiz item 13 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen141/2	General Knowledge Quiz item 14 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen151/2	General Knowledge Quiz item 15 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen161/2	General Knowledge Quiz item 16 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen171/2	General Knowledge Quiz item 17 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgen181/2	General Knowledge Quiz item 18 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icgenh1/2	General Knowledge Quiz, parent helped twin read questions (child at 9), 1Y 0N	child	item	integer	nominal	0=no, 1=yes
icgent1/2	General Knowledge test total score (child at 9), 0-18	child	derived	integer	scale value	0 to 18
icgoo011/2	Good at reading (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo021/2	Good at writing (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo031/2	Good at spelling (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo041/2	Good at solving number problems (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo051/2	Good at mental arithmetic (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo061/2	Good at multiplying and dividing (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo071/2	Good at learning about nature (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo081/2	Good at testing things out (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo091/2	Good at finding out how things work (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo101/2	Good at team games (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo111/2	Good at races and competitions (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
icgoo121/2	Good at PE classes (child at 9), see value labels	child	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ichom011/2	Home: parents set aside HW time (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom021/2	Home: TV usually on during HW (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom031/2	Home: often ask for help with HW (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom041/2	Home: helped with HW should be done alone (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom051/2	Home: nights per week HW set (child at 9), see value labels	child	item	integer	ordinal	0=0, 1=1, 2=2, 3=3, 4=4, 5=5 or more
ichom061/2	Home: hours per night doing HW (child at 9), see value labels	child	item	integer	ordinal	0=half or less, 1=1, 2=2, 3=3, 4=over 3
ichom071/2	Home: parents think education important (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom081/2	Home: parents think doing best important (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom091/2	Home: discuss school with parents (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom101/2	Home: parents are interested in marks (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom171/2	Home: often read for fun (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom181/2	Home: parent often reads to me (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom191/2	Home: taken to museum in past year (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom201/2	Home: I use computer at home (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ichom211/2	Home: how many childrens books (child at 9), see value labels	child	item	integer	ordinal	0=0, 1=1-5, 2=6-10, 3=11-20, 4=21-30, 5=31 or more
ichom221/2	Home: hours of TV watched school day (child at 9), see value labels	child	item	integer	ordinal	0=0, 1=1, 2=2, 3=3, 4=4, 5=5 or more
ichom231/2	Home: hours of TV watched weekend day (child at 9), see value labels	child	item	integer	ordinal	0=0, 1=1, 2=2, 3=3, 4=4, 5=5 or more
ichom321/2	Home: evening meals per week with parent (child at 9), 0-7	child	item	integer	quantitative	0 to 7
ichom331/2	Home: hours of sleep per school night (child at 9), see value labels	child	item	integer	ordinal	0=6 or less, 1=7, 2=8, 3=9, 4=10, 5=11 or more
icliaca1/2	Academic Liking scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
iclieng1/2	English Liking scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
iclik011/2	Like reading (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik021/2	Like writing (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik031/2	Like spelling (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik041/2	Like solving number problems (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik051/2	Like mental arithmetic (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik061/2	Like multiplying and dividing (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik071/2	Like learning about nature (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik081/2	Like testing things out (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik091/2	Like finding out how things work (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik101/2	Like team games (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik111/2	Like races and competitions (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclik121/2	Like PE classes (child at 9), see value labels	child	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
iclimat1/2	Maths Liking scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icliphy1/2	Physical Education Liking scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
iclisci1/2	Science Liking scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icmoaca1/2	Academic Overall Motivational scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icnv1/2	Non-Verbal composite (9 year child), standardised	child	derived	decimal	scale value	approx. -3 to +3 (standardized)
icodd11/2	Behaviour: argue with adults (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icodd21/2	Behaviour: refuse to obey adults (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icodd31/2	Behaviour: annoy people on purpose (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icodd41/2	Behaviour: easily get annoyed (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icodd51/2	Behaviour: often angry (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icoddt1/2	ODD total scale (child self-rated at 9), 0-10	child	derived	decimal	scale	0 to 10
icohort	Cohort for 9yr study, see value labels	admin	item	integer	nominal	1=school cohort 1: twins born Jan-94 to Aug-94, 2=school cohort 2: twins born Sep-94 to Aug-95
icpaaca1/2	Academic Perceived Ability scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icpaeng1/2	English Perceived Ability scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icpage	Age of twins (years) when parent and child booklets completed at 9	parent, admin	derived	decimal	quantitative	approx. 8.4 to 10 (years)
icpamat1/2	Maths Perceived Ability scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icpaphy1/2	Physical Education Perceived Ability scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icparnegt1/2	Negative parental feelings scale, child-self-rated at 9, 0-8	child	derived	decimal	scale value	0 to 8
icparpost1/2	Positive parental feelings scale, child-self-rated at 9, 0-6	child	derived	decimal	scale value	0 to 6
icpart1/2	Parental feelings total scale, child self-reported, 0-14	child	derived	decimal	scale value	0 to 14
icpasci1/2	Science Perceived Ability scale, Child-self-rated at 9 (1-5)	child	derived	decimal	scale value	1 to 5
icpLLCage	Age of twin when 9yr parent and child booklets completed (for use in LLC TRE), months	parent	derived	integer	quantitative	approx. 102 to 118 (months)
icpLLCdate	Date when 9yr parent and child booklets completed (for use in LLC TRE), yyyy-mm string	parent	derived	string	date value	approx. '2003-03' to '2004-07'
icpuz011/2	Puzzle Quiz item 1 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz031/2	Puzzle Quiz item 3 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz041/2	Puzzle Quiz item 4 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz051/2	Puzzle Quiz item 5 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz061/2	Puzzle Quiz item 6 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz071/2	Puzzle Quiz item 7 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz081/2	Puzzle Quiz item 8 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz091/2	Puzzle Quiz item 9 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz101/2	Puzzle Quiz item 10 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz111/2	Puzzle Quiz item 11 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz121/2	Puzzle Quiz item 12 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz131/2	Puzzle Quiz item 13 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz141/2	Puzzle Quiz item 14 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz151/2	Puzzle Quiz item 15 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz161/2	Puzzle Quiz item 16 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz171/2	Puzzle Quiz item 17 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz181/2	Puzzle Quiz item 18 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz191/2	Puzzle Quiz item 19 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz201/2	Puzzle Quiz item 20 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz211/2	Puzzle Quiz item 21 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz221/2	Puzzle Quiz item 22 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz231/2	Puzzle Quiz item 23 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuz241/2	Puzzle Quiz item 24 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icpuzt1/2	Puzzle test total score (child at 9), 0-23	child	derived	integer	scale value	0 to 23
icsdqbeht1/2	SDQ Behaviour Problems total (child self-report) at 9, 0-40	child	derived	decimal	scale value	0 to 40
icsdqcon11/2	Behaviour: get very angry (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqcon21/2	Behaviour: do as I am told (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqcon2r1/2	Reversed version of icsdqcon2, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icsdqcon31/2	Behaviour: fight a lot (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqcon41/2	Behaviour: lying or cheating (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqcon51/2	Behaviour: I take things not mine (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqcont1/2	SDQ Conduct scale (child self-report) at 9, 0-10	child	derived	decimal	scale value	0 to 10
icsdqemo11/2	Behaviour: get a lot of headaches (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqemo21/2	Behaviour: worry a lot (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqemo31/2	Behaviour: often unhappy (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqemo41/2	Behaviour: nervous in new situations (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqemo51/2	Behaviour: have many fears (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqemot1/2	SDQ Emotion scale (child self-report) at 9, 0-10	child	derived	decimal	scale value	0 to 10
icsdqhyp11/2	Behaviour: jumpy (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqhyp21/2	Behaviour: fidgeting or squirming (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqhyp31/2	Behaviour: easily distracted (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqhyp41/2	Behaviour: think before I act (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqhyp4r1/2	Reversed version of icsdqhyp4, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icsdqhyp51/2	Behaviour: finish my work (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqhyp5r1/2	Reversed version of icsdqhyp5, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icsdqhypt1/2	SDQ Hyperactivity scale (child self-report) at 9, 0-10	child	derived	decimal	scale value	0 to 10
icsdqper11/2	Behaviour: usually on my own (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqper21/2	Behaviour: one or more good friends (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqper2r1/2	Reversed version of icsdqper2, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icsdqper31/2	Behaviour: liked by others my age (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqper3r1/2	Reversed version of icsdqper3, see value labels	child	item	integer	ordinal	0=very true, 1=quite true, 2=not true
icsdqper41/2	Behaviour: other children pick on me (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqper51/2	Behaviour: get on better with adults (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqpert1/2	SDQ Peer Problem scale (child self-report) at 9, 0-10	child	derived	decimal	scale value	0 to 10
icsdqpro11/2	Behaviour: try to be nice (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqpro21/2	Behaviour: like to share with others (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqpro31/2	Behaviour: helpful if someone hurt (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqpro41/2	Behaviour: kind to younger children (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqpro51/2	Behaviour: often volunteer (child at 9), see value labels	child	item	integer	ordinal	0=not true, 1=quite true, 2=very true
icsdqprot1/2	SDQ Prosocial scale (child self-report) at 9, 0-10	child	derived	decimal	scale value	0 to 10
icshp021/2	Shapes Quiz item 2 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp031/2	Shapes Quiz item 3 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp041/2	Shapes Quiz item 4 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp051/2	Shapes Quiz item 5 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp061/2	Shapes Quiz item 6 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp071/2	Shapes Quiz item 7 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp081/2	Shapes Quiz item 8 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp091/2	Shapes Quiz item 9 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp101/2	Shapes Quiz item 10 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp111/2	Shapes Quiz item 11 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp121/2	Shapes Quiz item 12 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp131/2	Shapes Quiz item 13 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp141/2	Shapes Quiz item 14 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp151/2	Shapes Quiz item 15 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp161/2	Shapes Quiz item 16 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp171/2	Shapes Quiz item 17 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp181/2	Shapes Quiz item 18 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp191/2	Shapes Quiz item 19 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp201/2	Shapes Quiz item 20 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp211/2	Shapes Quiz item 21 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp221/2	Shapes Quiz item 22 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp231/2	Shapes Quiz item 23 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshp241/2	Shapes Quiz item 24 score (child at 9), 1right 0wrong	child	derived	integer	ordinal	0=incorrect, 1=correct
icshpt1/2	Shapes test total score (child at 9), 0-23	child	derived	integer	scale value	0 to 23
icvb1/2	Verbal composite (9 year child), standardised	child	derived	decimal	scale value	approx. -3 to +3 (standardized)
icwrd011/2	Word Quiz item 1 score (child at 9), 2best answer 0wrong	child	derived	integer	ordinal	0=incorrect, 2=correct
icwrd021/2	Word Quiz item 2 score (child at 9), 2best answer 0wrong	child	derived	integer	ordinal	0=incorrect, 2=correct
icwrd031/2	Word Quiz item 3 score (child at 9), 2best answer 0wrong	child	derived	integer	ordinal	0=incorrect, 2=correct
icwrd041/2	Word Quiz item 4 score (child at 9), 2best answer 0wrong	child	derived	integer	ordinal	0=incorrect, 2=correct
icwrd051/2	Word Quiz item 5 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd061/2	Word Quiz item 6 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd071/2	Word Quiz item 7 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd081/2	Word Quiz item 8 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd091/2	Word Quiz item 9 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd101/2	Word Quiz item 10 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd111/2	Word Quiz item 11 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd121/2	Word Quiz item 12 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd131/2	Word Quiz item 13 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd141/2	Word Quiz item 14 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd151/2	Word Quiz item 15 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd161/2	Word Quiz item 16 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd171/2	Word Quiz item 17 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd181/2	Word Quiz item 18 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd191/2	Word Quiz item 19 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrd201/2	Word Quiz item 20 score (child at 9), 2best answer 1other correct answer 0wrong	child	derived	integer	ordinal	0=incorrect, 1=partly correct, 2=correct
icwrdh1/2	Word Quiz, parent helped twin read questions (child at 9), 1Y 0N	child	item	integer	nominal	0=no, 1=yes
icwrdt1/2	Word/vocabulary test total score (child at 9), 0-40	child	derived	integer	scale value	0 to 40
inineyr	9 Year data present, 1Y 0N	parent, child, teacher	derived	integer	nominal	0=no, 1=yes
ipanx011/2	Behaviour: afraid of closed spaces etc (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx021/2	Behaviour: slow to warm to strangers (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx031/2	Behaviour: afraid social situations (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx041/2	Behaviour: checks things done right (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx051/2	Behaviour: asks for reassurance (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx061/2	Behaviour: insists on doing things over (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx071/2	Behaviour: shy or timid (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx081/2	Behaviour: afraid of medical procedures (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx091/2	Behaviour: twitches or mannerisms (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx101/2	Behaviour: does not enjoy self (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx111/2	Behaviour: critical of self (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx121/2	Behaviour: complains or whines (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx131/2	Behaviour: low self confidence (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx141/2	Behaviour: fussy (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx151/2	Behaviour: blames self (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx161/2	Behaviour: upset when parent leaves (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx171/2	Behaviour: keyed up or on edge (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx181/2	Behaviour: afraid of animals (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx191/2	Behaviour: anxious (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanx201/2	Behaviour: resists sleeping alone (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipanxfeart1/2	ARBQ fear total (9 year parent), 0-10	parent	derived	decimal	scale	0 to 10
ipanxnafft1/2	ARBQ negative affect total (9 year parent), 0-10	parent	derived	decimal	scale	0 to 10
ipanxncogt1/2	ARBQ negative cognition total (9 year parent), 0-12	parent	derived	decimal	scale	0 to 12
ipanxocbt1/2	ARBQ OCB total (9 year parent), 0-6	parent	derived	decimal	scale	0 to 6
ipanxshyt1/2	ARBQ shyness (social anxiety) total (9 year parent), 0-8	parent	derived	decimal	scale	0 to 8
ipanxt1/2	ARBQ overall anxiety total (9 year parent), 0-50	parent	derived	decimal	scale	0 to 50
ipaps011/2	Behaviour: blames others for mistakes (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps021/2	Behaviour: illegal activities (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps031/2	Behaviour: concerned about school progress (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps03r1/2	Reversed version of ipaps031, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipaps041/2	Behaviour: acts without thinking (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps051/2	Behaviour: shallow emotions (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps061/2	Behaviour: lies easily (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps071/2	Behaviour: keeps promises (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps07r1/2	Reversed version of ipaps071, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipaps081/2	Behaviour: brags excessively (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps091/2	Behaviour: gets bored easily (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps101/2	Behaviour: uses other people (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps111/2	Behaviour: teases (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps121/2	Behaviour: feels guilty when done wrong (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps12r1/2	Reversed version of ipaps121, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipaps131/2	Behaviour: risky activities (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps141/2	Behaviour: superficially charming (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps151/2	Behaviour: angry when corrected (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps161/2	Behaviour: thinks is more important (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps171/2	Behaviour: does not plan ahead (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps181/2	Behaviour: concerned about feelings (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps18r1/2	Reversed version of ipaps181, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipaps191/2	Behaviour: does not show feelings (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps201/2	Behaviour: keeps the same friends (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipaps20r1/2	Reversed version of ipaps201, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipapscalt1/2	APSD Callous-Unemotional scale (parent), 0-12	teacher	derived	decimal	scale value	0 to 12
ipapsdt1/2	APSD overall total scale (parent), 0-40	teacher	derived	decimal	scale value	0 to 40
ipapsecalt1/2	APDS Enhanced Callous-Unemotional scale (parent), 0-16	teacher	derived	decimal	scale value	0 to 16
ipapsimpt1/2	APSD Impulsivity scale (parent), 0-10	teacher	derived	decimal	scale value	0 to 10
ipapsnart1/2	APSD Narcissism scale (parent), 0-14	teacher	derived	decimal	scale value	0 to 14
ipasthm1/2	Twin has Asthma (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipbpalo1/2	Being a Parent: wish child would leave alone (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipbpamr1/2	Reversed version of ipbpamu1, see value labels	parent	item	integer	ordinal	0=often, 1=sometimes, 2=rarely or never
ipbpamu1/2	Being a Parent: feel amused by child (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipbpang1/2	Being a Parent: child makes me angry (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipbpclo1/2	Being a Parent: feel close to child (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipbpclr1/2	Reversed version of ipbpclo1, see value labels	parent	item	integer	ordinal	0=often, 1=sometimes, 2=rarely or never
ipbpeat1/2	Being a Parent: days per week child eats evening meal with parent (parent at 9), 0-7	parent	item	integer	quantitative	0 to 7
ipbpfru1/2	Being a Parent: feel frustrated by child (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipbphap1/2	Being a Parent: happy about relationship with child (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipbphar1/2	Reversed version of ipbphap1, see value labels	parent	item	integer	ordinal	0=often, 1=sometimes, 2=rarely or never
ipbpimp1/2	Being a Parent: feel impatient with child (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipbpsle1/2	Being a Parent: hours of sleep child gets per school night (parent at 9), see value labels	parent	item	integer	ordinal	1=6 or less, 2=7, 3=8, 4=9, 5=10, 6=11 or more
ipcacce1/2	CEQ Acceptance (parent) mean scale at 9, 0-2	parent	derived	decimal	scale value	0 to 2
ipcadve1/2	CEQ Adventure (parent) mean scale at 9, 0-2	parent	derived	decimal	scale value	0 to 2
ipcas011/2	Behaviour: wants to fit in with peers (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas01r1/2	Reversed version of ipcas011, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipcas021/2	Behaviour: odd communication style (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas031/2	Behaviour: interest in unusual topic (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas041/2	Behaviour: one-sided social behaviour (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas051/2	Behaviour: can keep conversation going (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas05r1/2	Reversed version of ipcas051, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipcas061/2	Behaviour: same interests as peers (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas06r1/2	Reversed version of ipcas061, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipcas071/2	Behaviour: unusual movements (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas081/2	Behaviour: unusual memory for details (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas091/2	Behaviour: tactless (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas101/2	Behaviour: turns conversations (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas111/2	Behaviour: loses the listener (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas131/2	Behaviour: likes to do things over (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas141/2	Behaviour: prefers imaginative activities (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas161/2	Behaviour: unusual eye gaze (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas171/2	Behaviour: interacts easily children (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas17r1/2	Reversed version of ipcas171, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipcas181/2	Behaviour: people are important (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas18r1/2	Reversed version of ipcas181, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipcas191/2	Behaviour: cares how perceived by group (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcas19r1/2	Reversed version of ipcas191, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipcas201/2	Behaviour: takes things literally (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcascomt1/2	CAST Communication scale at 9 (parent), 0-14	parent	derived	decimal	scale value	0 to 14
ipcasnont1/2	CAST Non-Social scale at 9 (parent), 0-10	parent	derived	decimal	scale value	0 to 10
ipcassoct1/2	CAST Social scale at 9 (parent), 0-14	parent	derived	decimal	scale value	0 to 14
ipcastt1/2	CAST overall total at 9 (parent), 0-38	parent	derived	decimal	scale value	0 to 38
ipchaos1r	Reversed version of ipchaos1x, see value labels	parent	item	integer	ordinal	0=certainly true, 1=somewhat true, 2=not true
ipchaos1x	Home: regular bedtime routine (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipchaos2x	Home: cannot hear yourself think (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipchaos3x	Home: a real zoo (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipchaos4r	Reversed version of ipchaos4x, see value labels	parent	item	integer	ordinal	0=certainly true, 1=somewhat true, 2=not true
ipchaos4x	Home: we stay on top of things (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipchaos5x	Home: usually a TV on (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipchaos6r	Reversed version of ipchaos6x, see value labels	parent	item	integer	ordinal	0=certainly true, 1=somewhat true, 2=not true
ipchaos6x	Home: calm atmosphere (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipchatot	Parent Chaos scale at 9, 0-12	parent	derived	decimal	scale value	0 to 12
ipcla011/2	Twin classroom: likes to be (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla021/2	Twin classroom: accepted by other children (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla031/2	Twin classroom: work will help in future (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla041/2	Twin classroom: feels upset (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla051/2	Twin classroom: work is interesting (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla061/2	Twin classroom: friends care about work (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla071/2	Twin classroom: teacher takes an interest (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla081/2	Twin classroom: feels unhappy (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla091/2	Twin classroom: gets on well with children (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla101/2	Twin classroom: has fun (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla111/2	Twin classroom: gets excited about work (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla121/2	Twin classroom: learning will help in 2ndary (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla131/2	Twin classroom: feels lonely (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla141/2	Twin classroom: teacher treates fairly (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla151/2	Twin classroom: likes to do extra work (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla161/2	Twin classroom: friends try their best (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla171/2	Twin classroom: teacher helps to do best (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla181/2	Twin classroom: feels worried (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla191/2	Twin classroom: learns things they care about (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla201/2	Twin classroom: friends enjoy learning (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla211/2	Twin classroom: teacher listens (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla221/2	Twin classroom: feels happy (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla231/2	Twin classroom: people think a lot of (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla241/2	Twin classroom: learning will be useful (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla251/2	Twin classroom: feels proud to be a pupil (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla261/2	Twin classroom: friends often in trouble (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla271/2	Twin classroom: popular with other children (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcla281/2	Twin classroom: learning is fun (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
ipcnega1/2	CEQ Negative Affect (parent) mean scale at 9, 0-2	parent	derived	decimal	scale value	0 to 2
ipcoga11/2	Behaviour: clever (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcoga21/2	Behaviour: can solve problems (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcoga31/2	Behaviour: finds learning easy (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipcom011/2	Communication: people can understand (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom021/2	Communication: rarely makes mistakes (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom031/2	Communication: speech sounds like younger (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom041/2	Communication: sentences harder to understand (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom051/2	Communication: speech is 2 or 3 word phrases (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom061/2	Communication: can say long sentences (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom071/2	Communication: leaves out words and endings (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom081/2	Communication: makes mistakes on pronouns (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom091/2	Communication: can give easy-to-follow account (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom101/2	Communication: can talk clearly about future (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom111/2	Communication: finds it hard to tell story (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcom121/2	Communication: uses words like he or it (parent at 9), see value labels	parent	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
ipcoppo1/2	CEQ Opportunity (parent) mean scale at 9, 0-2	parent	derived	decimal	scale value	0 to 2
ipcpeer1/2	CEQ Friends/Peer Context (parent) mean scale at 9, 0-2	parent	derived	decimal	scale value	0 to 2
ipcsati1/2	CEQ Classroom Satisfaction (parent) mean scale at 9, 0-2	parent	derived	decimal	scale value	0 to 2
ipcteac1/2	CEQ Teachers (parent) mean scale at 9, 0-2	parent	derived	decimal	scale value	0 to 2
ipdadld	Dad had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ipdata	Parent booklet data present at 9, 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipdiask1/2	Discipline: ask someone else (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipdiexp1/2	Discipline: explain or reason (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipdiexr1/2	Reversed version of ipdiexp1, see value labels	parent	item	integer	ordinal	0=often, 1=sometimes, 2=rarely or never
ipdifir1/2	Discipline: be firm or calm (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipdifrr1/2	Reversed version of ipdifir1, see value labels	parent	item	integer	ordinal	0=often, 1=sometimes, 2=rarely or never
ipdijok1/2	Discipline: make a joke (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipdisavot1/2	Parental discipline avoidance scale, parent-reported, 0-4	parent	derived	decimal	scale value	0 to 4
ipdisho1/2	Discipline: shout or tell off (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipdisma1/2	Discipline: smack (parent at 9), see value labels	parent	item	integer	ordinal	0=rarely or never, 1=sometimes, 2=often
ipdisnegt1/2	Parental discipline negative/harsh scale, parent-reported, 0-4	parent	derived	decimal	scale value	0 to 4
ipdispost1/2	Parental discipline positive scale, parent-reported, 0-4	parent	derived	decimal	scale value	0 to 4
ipeczem1/2	Twin has Eczema (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipemi11/2	Behaviour: makes most of tedious tasks (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipemi21/2	Behaviour: likes to use brain (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipemi31/2	Behaviour: takes criticism (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipemi41/2	Behaviour: puts in more effort to improve (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipemi51/2	Behaviour: fun is more important (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipfinchange	Major financial changes over last two years (parent at 9), see value labels	parent	item	integer	nominal	0=no, 1=yes but same financial situation now, 2=yes finances now worse, 3=yes finances now better
ipfooal1/2	Twin has Other Food Allergy (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipgoo011/2	Good at reading (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo021/2	Good at writing (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo031/2	Good at spelling (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo041/2	Good at solving number problems (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo051/2	Good at mental arithmetic (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo061/2	Good at multiplying and dividing (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo071/2	Good at learning about nature (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo081/2	Good at testing things out (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo091/2	Good at finding out how things work (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo101/2	Good at team games (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo111/2	Good at races and competitions (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
ipgoo121/2	Good at PE classes (parent at 9), see value labels	parent	item	integer	ordinal	1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
iphayfv1/2	Twin has Hayfever (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iphom011/2	Home: make sure child sets aside HW time (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom021/2	Home: TV is on when child doing HW (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom031/2	Home: help with HW when needed (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom041/2	Home: help with HW should be done alone (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom051/2	Home: nights per week HW is set (parent at 9), see value labels	parent	item	integer	ordinal	0=0, 1=1, 2=2, 3=3, 4=4, 5=5 or more
iphom061/2	Home: hours per night spent on HW (parent at 9), see value labels	parent	item	integer	ordinal	0=half or less, 1=1, 2=2, 3=3 or more
iphom07X	Home: good education is important (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom08X	Home: important to do best in school (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom091/2	Home: discuss school activities with child (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom101/2	Home: interested in school marks (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom171/2	Home: child reads for fun (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom181/2	Home: I often read to child (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom191/2	Home: child taken to museum in last year (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom201/2	Home: computer at home used by child (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
iphom21X	Home: how many books (parent at 9), see value labels	parent	item	integer	ordinal	1=0-10, 2=11-25, 3=26-50, 4=51-99, 5=100 or more
iphom221/2	Home: hours of TV watched per school day (parent at 9), see value labels	parent	item	integer	ordinal	0=0, 1=1, 2=2, 3=3, 4=4, 5=5 or more
iphom231/2	Home: hours of TV watched per weekend day (parent at 9), see value labels	parent	item	integer	ordinal	0=0, 1=1, 2=2, 3=3, 4=4, 5=5 or more
ipincome	Household income (parent at 9), see value labels	parent	item	integer	ordinal	1=under £4500, 2=£4500-9499, 3=£9500-15499, 4=£15500-17499, 5=£17500-24999, 6=£25000-29999, 7=£30000-39999, 8=£40000-49999, 9=£50000-74999, 10=£75000-99999, 11=£100000 or more
ipintrnt	Internet access at home (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldaut1/2	Twin learning difficulty: Autism or Aspergers (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplddsl1/2	Twin learning difficulty: Dyslexia/Reading (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplddsp1/2	Twin learning difficulty: Dyspraxia/Motor Skills (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldeye1/2	Twin learning difficulty: Eyesight (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldfal1/2	Twin learning difficulty: Falling behind at school (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldhea1/2	Twin learning difficulty: Hearing (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldhyp1/2	Twin learning difficulty: Hyperactivity/ADHD (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldlan1/2	Twin learning difficulty: Language/Speech (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldmth1/2	Twin learning difficulty: Maths (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldrst1/2	Twin learning difficulty: Restless/Concentration (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldspl1/2	Twin learning difficulty: Spelling (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipldwri1/2	Twin learning difficulty: Writing (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplebirs	Life Event: Birth of Younger Sibling (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplebcount	Count of reported life events (9 year parent), 0-6	parent	derived	integer	ordinal	0 to 6
ipledivp	Life Event: Divorce/Separation of Parents (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipledthg	Life Event: Death of Grandparent (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipledtho	Life Event: Death of Other Relative/Friend (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplefind	Life Event: unemployment or financial difficulties (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplehos1/2	Life Event: Hospitalisation of twin (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplehosp	Life Event: Hospitalisation of Parent (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplehoss	Life Event: Hospitalisation of Sibling (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipleillr	Life Event: Illness/Injury of Relative/Friend (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplemovh	Life Event: Moved House (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplenewc	Life Event: New Child (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplenewp	Life Event: New Parent Figure (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipleoth	Life Event: other categories (parent at 9), see value labels	parent	item	integer	nominal	0=no, 1=family member moved away, 2=death of pet, 3=bullying or harrassment
iplesepp	Life Event: Prolonged Separation from Parent (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplhadlt	Other adults living in household (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplhgndp	Grandparent living in household (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplhlen	Other adult length of time in household (parent at 9), see value labels	parent	item	integer	ordinal	1=under 1 year, 2=1 to 4 years, 3=over 4 years
iplhnann	Nanny/au pair living in household (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplhorel	Other relative living in household (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
iplhothr	Other category of adult living in household (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipliaca1/2	Academic Liking scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
iplieng1/2	English Liking scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
iplik011/2	Likes reading (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik021/2	Likes writing (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik031/2	Likes spelling (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik041/2	Likes solving number problems (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik051/2	Likes mental arithmetic (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik061/2	Likes multiplying and dividing (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik071/2	Likes learning about nature (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik081/2	Likes testing things out (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik091/2	Likes finding out how things work (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik101/2	Likes team games (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik111/2	Likes races and competitions (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplik121/2	Likes PE classes (parent at 9), see value labels	parent	item	integer	ordinal	1=likes it very much, 2=does like it, 3=think it's OK, 4=doesn't like it at all, 5=dislikes it very much
iplimat1/2	Maths Liking scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
ipliphy1/2	Physical Education Liking scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
iplisci1/2	Science Liking scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
iplndif1/2	Twin has Learning Difficulties (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipmarist	Your marital status (parent at 9), see value labels	parent	item	integer	nominal	1=married to natural parent, 2=married to other, 3=cohabiting with natural parent, 4=cohabiting with other, 5=single separated, 6=single divorced, 7=single never married, 8=single widowed
ipmgfld	Maternal Grandfather had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ipmgmld	Maternal Grandmother had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ipmoaca1/2	Academic Overall Motivational scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
ipmumld	Mum had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ipnutal1/2	Twin has Nut Allergy (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipodd11/2	Behaviour: argues with adults (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipodd31/2	Behaviour: deliberately annoys (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipodd41/2	Behaviour: touchy (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipodd51/2	Behaviour: angry and resentful (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipodd61/2	Behaviour: spiteful or vindictive (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipoddt1/2	ODD total scale (parent at 9), 0-10	parent	derived	decimal	scale	0 to 10
iposbld	Older Sibling Brother had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ipossld	Older Sibling Sister had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ipothal1/2	Twin has Any Other Allergies (parent at 9), see value labels	parent	item	integer	nominal	0=no, 1=antibiotics, 2=animals or fur, 3=other skin contact, 9=miscellaneous other
ippaaca1/2	Academic Perceived Ability scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
ippaeng1/2	English Perceived Ability scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
ippag11/2	Behaviour: uses physical force (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ippag21/2	Behaviour: threatens others (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ippag31/2	Behaviour: gets others to gang up (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ippagt1/2	Proactive Aggression scale (parent), 0-6	teacher	derived	decimal	scale value	0 to 6
ippamat1/2	Maths Perceived Ability scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
ippaphy1/2	Physical Education Perceived Ability scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
ipparlen	Partner length of time with family (parent at 9), see value labels	parent	item	integer	ordinal	1=under 6 months, 2=6 months to 1 year, 3=1 to 2 years, 4=2 to 3 years, 5=3 to 4 years, 6=over 4 years
ipparnegt1/2	Negative parental feelings scale, parent-rated at 9, 0-8	parent	derived	decimal	scale value	0 to 8
ipparpost1/2	Positive parental feelings scale, parent-rated at 9, 0-6	parent	derived	decimal	scale value	0 to 6
ipparrel	Partner relationship to twins (parent at 9), see value labels	parent	item	integer	nominal	0=other, 1=birth mother, 2=natural father, 3=stepmother, 4=stepfather, 5=foster mother, 6=foster father, 7=grandmother, 8=grandfather
ippart1/2	Parental feelings total scale, Parent-reported, 0-14	parent	derived	decimal	scale value	0 to 14
ippartnr	Currently live with a partner (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ippasci1/2	Science Perceived Ability scale, Parent-rated at 9 (1-5)	parent	derived	decimal	scale value	1 to 5
ippgfld	Paternal Grandfather had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ippgmld	Paternal Grandmother had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
iprag11/2	Behaviour: blames others in fights (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iprag21/2	Behaviour: strikes back when teased (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iprag31/2	Behaviour: overreacts angrily (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipragt1/2	Reactive Aggression scale (parent), 0-6	teacher	derived	decimal	scale value	0 to 6
iprelat	Your relationship to twins (parent at 9), see value labels	parent	item	integer	nominal	0=other, 1=birth mother, 2=natural father, 3=stepmother, 4=stepfather, 5=foster mother, 6=foster father, 7=grandmother, 8=grandfather
iprelldlang	Number of reported relatives with language problems, see value labels	parent	derived	integer	ordinal	0, 1, 2, 3, 4=4-6, 5=7-10
iprelldread	Number of reported relatives with reading problems, see value labels	parent	derived	integer	ordinal	0, 1, 2, 3, 4=4-6, 5=7-10
ipsdqbeht1/2	SDQ Behaviour Problems total (parent) at 9, 0-40	parent	derived	decimal	scale value	0 to 40
ipsdqcon11/2	Behaviour: temper tantrums (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqcon21/2	Behaviour: obedient (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqcon2r1/2	Reversed version of ipsdqcon21, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipsdqcon31/2	Behaviour: fights or bullies (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqcon41/2	Behaviour: often lies or cheats (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqcon51/2	Behaviour: steals (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqcont1/2	SDQ Conduct scale (parent) at 9, 0-10	parent	derived	decimal	scale value	0 to 10
ipsdqemo11/2	Behaviour: complains of headaches (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqemo21/2	Behaviour: many worries (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqemo31/2	Behaviour: often unhappy (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqemo41/2	Behaviour: nervous or clingy (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqemo51/2	Behaviour: many fears (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqemot1/2	SDQ Emotion scale (parent) at 9, 0-10	parent	derived	decimal	scale value	0 to 10
ipsdqhyp11/2	Behaviour: restless (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqhyp21/2	Behaviour: fidgets or squirms (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqhyp31/2	Behaviour: easily distracted (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqhyp41/2	Behaviour: thinks before acting (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqhyp4r1/2	Reversed version of ipsdqhyp41, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipsdqhyp51/2	Behaviour: sees tasks through to end (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqhyp5r1/2	Reversed version of ipsdqhyp51, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipsdqhypt1/2	SDQ Hyperactivity scale (parent) at 9, 0-10	parent	derived	decimal	scale value	0 to 10
ipsdqper11/2	Behaviour: solitary (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqper21/2	Behaviour: has at least one good friend (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqper2r1/2	Reversed version of ipsdqper21, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipsdqper31/2	Behaviour: generally liked (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqper3r1/2	Reversed version of ipsdqper31, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipsdqper41/2	Behaviour: picked on by other children (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqper51/2	Behaviour: gets on better with adults (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqpert1/2	SDQ Peer Problem scale (parent) at 9, 0-10	parent	derived	decimal	scale value	0 to 10
ipsdqpro11/2	Behaviour: considerate (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqpro21/2	Behaviour: shares with other children (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqpro31/2	Behaviour: helpful if someone hurt (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqpro3r1/2	Reversed version of ipsdqpro31, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipsdqpro41/2	Behaviour: kind to younger children (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqpro4r1/2	Reversed version of ipsdqpro41, see value labels	parent	item	integer	ordinal	0=very true, 1=quite true, 2=not true
ipsdqpro51/2	Behaviour: volunteers to help others (parent at 9), see value labels	parent	item	integer	ordinal	0=not true, 1=quite true, 2=very true
ipsdqprot1/2	SDQ Prosocial scale (parent) at 9, 0-10	parent	derived	decimal	scale value	0 to 10
ipsen1/2	Twin has Statement of SEN (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipsenrg1/2	Twin is on SEN Register (parent at 9), 1Y 0N	parent	item	integer	nominal	0=no, 1=yes
ipysbld	Younger Sibling Brother had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
ipyssld	Younger Sibling Sister had learning difficulties (parent at 9), see value labels	parent	item	integer	nominal	1=talking or language problems, 2=reading problems, 3=both, 4=neither
isamesch	Twins at the same school at 9 (from admin database), 1Y 0N	admin	item	integer	nominal	0=no, 1=yes
isametch	Twins have same teacher at 9 (from admin database), 1Y 0N	admin	item	integer	nominal	0=no, 1=yes
it2ac1/2	2-subject (English, Maths) mean NC level (9 year teacher), 1-5	teacher	derived	decimal	scale value	1 to 5 (NC level)
it3ac1/2	3-subject (English, maths, science) mean NC level (9 year teacher), 1-5	teacher	derived	decimal	scale value	1 to 5 (NC level)
itage1/2	Age of twin (years) when teacher booklet returned at 9	admin	derived	decimal	quantitative	approx. 8.4 to 10 (years)
itanx061/2	Behaviour: insists on doing things over (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps011/2	Behaviour: blames others for mistakes (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps021/2	Behaviour: illegal activities (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps031/2	Behaviour: concerned about school progress (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps03r1/2	Reversed version of itaps03, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itaps041/2	Behaviour: acts without thinking (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps051/2	Behaviour: shallow emotions (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps061/2	Behaviour: lies easily (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps071/2	Behaviour: keeps promises (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps07r1/2	Reversed version of itaps07, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itaps081/2	Behaviour: brags excessively (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps091/2	Behaviour: easily bored (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps101/2	Behaviour: uses other people (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps111/2	Behaviour: teases or makes fun (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps121/2	Behaviour: feels guilty (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps12r1/2	Reversed version of itaps12, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itaps131/2	Behaviour: risky activities (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps141/2	Behaviour: insincerely charming (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps151/2	Behaviour: angry when corrected (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps161/2	Behaviour: thinks more important (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps171/2	Behaviour: does not plan ahead (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps181/2	Behaviour: concerned about feelings (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps18r1/2	Reversed version of itaps18, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itaps191/2	Behaviour: does not show feelings (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps201/2	Behaviour: keeps same friends (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itaps20r1/2	Reversed version of itaps20, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itapscalt1/2	APSD Callous-Unemotional scale (teacher), 0-12	parent	derived	decimal	scale value	0 to 12
itapsdt1/2	APSD overall total scale (teacher), 0-40	parent	derived	decimal	scale value	0 to 40
itapsecalt1/2	APSD Enhanced Callous-Unemotional scale (teacher), 0-16	parent	derived	decimal	scale value	0 to 16
itapsimpt1/2	APSD Impulsivity scale (teacher), 0-10	parent	derived	decimal	scale value	0 to 10
itapsnart1/2	APSD Narcissism scale (teacher), 0-14	parent	derived	decimal	scale value	0 to 14
itcas011/2	Behaviour: wants to fit in with peers (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas01r1/2	Reversed version of itcas01, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itcas021/2	Behaviour: odd communication style (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas031/2	Behaviour: interest in unusual topic (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas041/2	Behaviour: one-sided social behaviour (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas051/2	Behaviour: can keep conversation going (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas05r1/2	Reversed version of itcas051, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itcas061/2	Behaviour: same interests as peers (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas06r1/2	Reversed version of itcas06, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itcas071/2	Behaviour: unusual movements (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas081/2	Behaviour: unusual memory for detail (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas091/2	Behaviour: tactless (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas101/2	Behaviour: turns conversations (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas111/2	Behaviour: loses the listener (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas131/2	Behaviour: likes to do things over (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas141/2	Behaviour: prefers imaginative activities (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas161/2	Behaviour: unusual eye gaze (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas171/2	Behaviour: interacts easily with children (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas17r1/2	Reversed version of itcas17, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itcas181/2	Behaviour: people are important (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas18r1/2	Reversed version of itcas18, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itcas191/2	Behaviour: cares how perceived by class (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcas19r1/2	Reversed version of itcas19, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itcas201/2	Behaviour: takes things literally (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcascomt1/2	CAST Communication scale at 9 (teacher), 0-14	teacher	derived	decimal	scale value	0 to 14
itcasnont1/2	CAST Non-Social scale at 9 (teacher), 0-10	teacher	derived	decimal	scale value	0 to 10
itcassoct1/2	CAST Social scale at 9 (teacher), 0-14	teacher	derived	decimal	scale value	0 to 14
itcastt1/2	CAST overall total at 9 (teacher), 0-38	teacher	derived	decimal	scale value	0 to 38
itcla11/2	Classroom: likes to be (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itcla21/2	Classroom: friends care about work (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itcla31/2	Classroom: has fun (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itcla41/2	Classroom: friends try their best (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itcla51/2	Classroom: friends enjoy learning (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itcla61/2	Classroom: feels happy (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itcla71/2	Classroom: feels proud (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itcla81/2	Classroom: friends get in trouble (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=somewhat true, 2=certainly true
itclasz1/2	Class size at 9, see value labels	teacher	item	integer	ordinal	1=less than 20, 2=20-30, 3=more than 30
itcoga11/2	Behaviour: is clever (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcoga21/2	Behaviour: solves problems (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcoga31/2	Behaviour: finds learning easy (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itcom011/2	Communication: people can understand (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom021/2	Communication: rarely makes mistakes (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom031/2	Communication: speech sounds like younger (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom041/2	Communication: sentences harder to understand (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true, 3=don't know
itcom051/2	Communication: speech is 2 or 3 word phrases (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom061/2	Communication: can say long sentences (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom071/2	Communication: leaves out words and endings (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom081/2	Communication: makes mistakes on pronouns (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom091/2	Communication: can give easy-to-follow account (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true, 3=don't know
itcom101/2	Communication: can talk clearly about future (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom111/2	Communication: finds it hard to tell story (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcom121/2	Communication: uses words like he or it (teacher at 9), see value labels	teacher	item	integer	nominal	0=not true, 1=somewhat true, 2=certainly true
itcpeer1/2	CEQ Friends/Peer Context (teacher) mean scale at 9, 0-2	teacher	derived	decimal	scale value	0 to 2
itcsati1/2	CEQ Classroom Satisfaction (teacher) mean scale at 9, 0-2	teacher	derived	decimal	scale value	0 to 2
itdata1/2	Teacher booklet data present at 9, 1Y 0N	teacher	item	integer	nominal	0=no, 1=yes
itemi11/2	Behaviour: makes most of tedious tasks (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itemi21/2	Behaviour: likes using brain (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itemi31/2	Behaviour: takes criticism (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itemi41/2	Behaviour: puts in more effort to improve (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itemi51/2	Behaviour: fun more important than work (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
iteng1/2	English mean NC level (9 year teacher), 1-5	teacher	derived	decimal	scale value	1 to 5 (NC level)
itengre1/2	English Reading (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itengsp1/2	English Speaking and Listening (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itengwr1/2	English Writing (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itgoo011/2	Good at reading (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo021/2	Good at writing (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo031/2	Good at spelling (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo041/2	Good at solving number problems (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo051/2	Good at mental arithmetic (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo061/2	Good at multiplying and dividing (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo071/2	Good at learning about nature (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo081/2	Good at testing things out (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo091/2	Good at finding out how things work (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo101/2	Good at team games (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo111/2	Good at races and competitions (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
itgoo121/2	Good at PE classes (teacher at 9), see value labels	teacher	item	integer	ordinal	1=excellent, 2=very good, 3=satisfactory, 4=poor, 5=very poor
ithwfin1/2	Homework: usually finishes (teacher at 9), see value labels	teacher	item	integer	ordinal	0=none, 1=little, 2=some of it, 3=most of it, 4=all of it
ithwinv1/2	Homework: involves others (teacher at 9), 1Y 0N	teacher	item	integer	nominal	0=no, 1=yes
ithwnts1/2	Homework: nights per week (teacher at 9), 0-5	teacher	item	integer	quantitative	0 to 5
itliaca1/2	Academic Liking scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itlieng1/2	English Liking scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itlik011/2	Likes reading (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik021/2	Likes writing (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik031/2	Likes spelling (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik041/2	Likes solving number problems (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik051/2	Likes mental arithmetic (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik061/2	Likes multiplying and dividing (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik071/2	Likes learning about nature (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik081/2	Likes testing things out (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik091/2	Likes finding out how things work (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik101/2	Likes team games (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik111/2	Likes races and competitions (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlik121/2	Likes PE classes (teacher at 9), see value labels	teacher	item	integer	ordinal	1=like it very much, 2=do like it, 3=it's OK, 4=don't like it, 5=don't like at all
itlimat1/2	Maths Liking scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itliphy1/2	Physical Education Liking scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itlisci1/2	Science Liking scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itLLCage1	Age of twin when 9yr teacher booklet returned (for use in LLC TRE), months	teacher	derived	integer	quantitative	approx. 102 to 118 (months)
itLLCdate1	Date when 9yr teacher booklet returned (for use in LLC TRE), yyyy-mm string	teacher	derived	string	date value	approx. '2003-04' to '2004-08'
itmat1/2	Maths mean NC level (9 year teacher), 1-5	teacher	derived	decimal	scale value	1 to 5 (NC level)
itmatnu1/2	Maths Number and Algebra (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itmatsh1/2	Maths Shape Space and Measures (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itmatus1/2	Maths Using and Applying (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itmoaca1/2	Academic Overall Motivational scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itodd11/2	Behaviour: argues with adults (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itodd31/2	Behaviour: deliberately annoys (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itodd41/2	Behaviour: touchy (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itodd51/2	Behaviour: often angry (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itodd61/2	Behaviour: spiteful (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itoddt1/2	ODD total scale (teacher at 9), 0-10	teacher	derived	decimal	scale	0 to 10
itpaaca1/2	Academic Perceived Ability scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itpaeng1/2	English Perceived Ability scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itpag11/2	Behaviour: uses physical force (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itpag21/2	Behaviour: threatens and bullies (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itpag31/2	Behaviour: gets others to gang up (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itpagt1/2	Proactive Aggression scale (teacher), 0-6	parent	derived	decimal	scale value	0 to 6
itpamat1/2	Maths Perceived Ability scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itpaphy1/2	Physical Education Perceived Ability scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itpasci1/2	Science Perceived Ability scale, Teacher-rated at 9 (1-5)	teacher	derived	decimal	scale value	1 to 5
itrag11/2	Behaviour: blames others in fights (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itrag21/2	Behaviour: strikes back when teased (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itrag31/2	Behaviour: overreacts angrily (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itragt1/2	Reactive Aggression scale (teacher), 0-6	parent	derived	decimal	scale value	0 to 6
itsci1/2	Science mean NC level (9 year teacher), 1-5	teacher	derived	decimal	scale value	1 to 5 (NC level)
itschtp1/2	School type at 9, 1state 2private	teacher	item	integer	nominal	1=state, 2=private
itscili1/2	Science Life Processes (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itsciph1/2	Science Physical Processes (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itscisc1/2	Science Scientific Enquiry (teacher NC rating at 9), 1-5	teacher	item	integer	quantitative	1 to 5
itsdqbeht1/2	SDQ Behaviour Problems total (teacher) at 9, 0-40	teacher	derived	decimal	scale value	0 to 40
itsdqcon11/2	Behaviour: temper tantrums (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqcon21/2	Behaviour: obedient (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqcon2r1/2	Reversed version of itsdqcon2, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itsdqcon31/2	Behaviour: often fights (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqcon41/2	Behaviour: often lies or cheats (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqcon51/2	Behaviour: steals (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqcont1/2	SDQ Conduct scale (teacher) at 9, 0-10	teacher	derived	decimal	scale value	0 to 10
itsdqemo11/2	Behaviour: complains of headaches (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqemo21/2	Behaviour: many worries (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqemo31/2	Behaviour: often unhappy (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqemo41/2	Behaviour: nervous in new situations (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqemo51/2	Behaviour: many fears (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqemot1/2	SDQ Emotion scale (teacher) at 9, 0-10	teacher	derived	decimal	scale value	0 to 10
itsdqhyp11/2	Behaviour: restless or overactive (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqhyp21/2	Behaviour: fidgets or squirms (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqhyp31/2	Behaviour: easily distracted (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqhyp41/2	Behaviour: thinks things out (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqhyp4r1/2	Reversed version of itsdqhyp4, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itsdqhyp51/2	Behaviour: sees tasks through (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqhyp5r1/2	Reversed version of itsdqhyp5, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itsdqhypt1/2	SDQ Hyperactivity scale (teacher) at 9, 0-10	teacher	derived	decimal	scale value	0 to 10
itsdqper11/2	Behaviour: solitary (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqper21/2	Behaviour: has at least one good friend (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqper2r1/2	Reversed version of itsdqper2, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itsdqper31/2	Behaviour: generally liked (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqper3r1/2	Reversed version of itsdqper31, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itsdqper41/2	Behaviour: picked on or bullied (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqper51/2	Behaviour: gets on better with adults (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqpert1/2	SDQ Peer Problem scale (teacher) at 9, 0-10	teacher	derived	decimal	scale value	0 to 10
itsdqpro11/2	Behaviour: considerate (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqpro21/2	Behaviour: shares readily (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqpro31/2	Behaviour: helpful if someone hurt (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqpro3r1/2	Reversed version of itsdqpro3, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itsdqpro41/2	Behaviour: kind to younger children (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqpro4r1/2	Reversed version of itsdqpro4, see value labels	teacher	item	integer	ordinal	0=very true, 1=quite true, 2=not true
itsdqpro51/2	Behaviour: often volunteers to help (teacher at 9), see value labels	teacher	item	integer	ordinal	0=not true, 1=quite true, 2=very true
itsdqprot1/2	SDQ Prosocial scale (teacher) at 9, 0-10	teacher	derived	decimal	scale value	0 to 10
itsen1/2	Has a Statement of SEN (teacher at 9), 1Y 0N	teacher	item	integer	nominal	0=no, 1=yes
itsenrg1/2	On the SEN Register (teacher at 9), 1Y 0N	teacher	item	integer	nominal	0=no, 1=yes