TEDS Data Dictionary

Variables in the 10 Year Dataset

The table on this page lists all 10 Year variables. This includes all item variables from the 10 Year questionnaires and web activities, as well as derived variables that are based on 10 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 web tests
    • parent - from the parent web questionnaire
    • teacher - from the (paper) teacher questionnaire
    • admin - administrative data, logged in the TEDS admin database
  • Item or derived variable?
  • Data type:
    • integer - numeric whole numbers
    • decimal - numeric with fractional values
    • string - alphanumeric character strings
  • Variable type:
    • nominal - categorical, with arbitrary numeric or string values
    • ordinal - categorical, with ordered numeric values
    • quantitative - numerical measurements of some concrete quantity such as age or time interval
    • 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 namedataset variable labelsource of dataitem or derived variable?data typevariable levelcoding or approximate range of values
jaXXa1/2 (XX is the item number, 01-42)Author recognition (10 year web) response: item XX selected, 1Y 0Nchild itemintegernominal0=no (not selected), 1=yes (selected)
jadata1/2Author recognition web test completed by child at 10, 1Y 0Nchilditemintegernominal 0=no, 1=yes
jarcortt1/2Author Recognition (10 year web) number of correct authors selected, 0-21childderivedintegerscale value 0 to 21
jarinctt1/2Author Recognition (10 year web) number of incorrect authors selected, 0-21childderivedintegerscale value 0 to 21
jartt1/2Author Recognition (10 year web) adjusted total score, -21 to +21childderivedintegerscale value -21 to +21
jastat1/2Author Recognition web test status at 10, see value labelschilditemintegernominal 0=not started, 2=completed successfully, 4=completed but responded randomly
jcdata1/2Twin web data (at least one test) present at 10, 1Y 0N childderivedintegernominal0=no, 1=yes
jcg1/2Child G composite (10 year twin web), standardised childderiveddecimalscale valueapprox. -3 to +3 (standardised)
jcnv1/2Child Non-verbal composite (10 year twin web), standardisedchildderiveddecimalscale valueapprox. -3 to +3 (standardised)
jcohortCohort for 10yr study, see value labelsadmin itemintegernominal1=twins born Jan-94 to Aug-94, 2=twins born Sep-94 to Aug-95
jcstage1/2Age of twin (years) when web tests started at 10 childderiveddecimalquantitativeapprox. 9.4 to 10.8 (years)
jcstLLCage1Age of twin when 10yr child web tests started (for use in LLC TRE), months childderivedintegerquantitativeapprox. 113 to 130 (months)
jcstLLCdate1Date when 10yr child web tests started (for use in LLC TRE), yyyy-mm string childderivedstringdate valueapprox. '2004-06' to '2005-09'
jcvb1/2Child Verbal composite (10 year twin web), standardised childderiveddecimalscale valueapprox. -3 to +3 (standardised)
jgdata1/2General Knowledge web test completed by child at 10, 1Y 0Nchilditemintegernominal 0=no, 1=yes
jgenkat1/2General knowledge test (10 year web) mean answer time (seconds)childderiveddecimalquantitative approx. 0-30 seconds
jgent1/2General Knowledge (10 year web) total score, 0-30 childderivedintegerscale value0 to 30
jgenta1/2General Knowledge (10 year web) adjusted total score, 0-30childderiveddecimalscale value 0 to 30
jgsess1/2General Knowledge web test number of sessions at 10 childitemintegerquantitativeapprox. 1-5
jgstat1/2General knowledge web test status at 10, see value labelschilditemintegernominal 0=not started, 1=started but not completed, 2=completed successfully, 4=completed but responded randomly
jgtime1/2General Knowledge web test time elapsed at 10, seconds childitemintegerquantitativeapprox. 0-1500 seconds
jgXXa1/2 (XX is the item number, 01-30)General knowledge (10 year web) item XX answer selected, see value labelschild itemintegernominal1 to 4
jgXXs1/2 (XX is the item number, 01-30)General knowledge (10 year web) item XX score, 1right 0wrongchilditem integerordinal0=incorrect, 1=correct
jlitenv1/2Literacy environment scale (twin web at 10), 1-4 childderiveddecimalscale value1 to 4
jmatenv1/2Maths environment scale (twin web at 10), 1-4 childderiveddecimalscale value1 to 4
jmathat1/2Maths test (10 year web) mean answer time (seconds) childderiveddecimalquantitativeapprox. 0-100 seconds
jmatt1/2Maths (10 year web) overall total score, 0-77 childderivedintegerscale value0 to 77
jmatta1/2Maths (10 year web) adjusted overall total score, 0-77 childderiveddecimalscale value0 to 77
jmcat1t1/2Maths (10 year web) category 1 (Understanding Numbers) total score, 0-27childderivedinteger scale value0 to 27
jmcat2t1/2Maths (10 year web) category 2 (Non-Numerical Processes) total score, 0-19childderivedinteger scale value0 to 19
jmcat3t1/2Maths (10 year web) category 3 (Computation and Knowledge) total score, 0-31childderivedinteger scale value0 to 31
jmcat4t1/2Maths (10 year web) category 4 (Mathematical Interpretation), cohort 1 only, total score, 0-33child derivedintegerscale value0 to 33
jmcat5t1/2Maths (10 year web) category 5 (Mathematical Application), cohort 1 only, total score, 0-24childderived integerscale value0 to 24
jmdata1/2Maths web test completed by child at 10, 1Y 0N childitemintegernominal0=no, 1=yes
jmsess1/2Maths web test number of sessions at 10child itemintegerquantitativeapprox. 1-15
jmstat1/2Maths web test status at 10, see value labels childitemintegernominal0=not started, 1=started but not completed, 2=completed successfully, 4=completed but responded randomly
jmtime1/2Maths web test time elapsed at 10, seconds childitemintegerquantitativeapprox. 0-4000 seconds
jmXYYYa1/2 (XYYY is the item number, first digit X is the sub-test category 1-5)Maths (10 year web) category X item XYYY response, see value labelschild itemstringnominal1=correct response, 2=incorrect response, 3=empty response,
-1=timed out,
-2=branched and credited,
-3=discontinued,
-4=crashed or malfunctioned
jmXYYYs1/2 (XYYY is the item number, first digit X is the sub-test category 1-5)Maths (10 year web) category X item XYYY score, 1right 0wrongchilditemintegerordinal 0=incorrect, 1=correct
jpcdata1/2Picture Completion web test completed by child at 10, 1Y 0Nchilditemintegernominal 0=no, 1=yes
jpcsess1/2Picture Completion web test number of sessions at 10 childitemintegerquantitativeapprox. 1-5
jpcstat1/2Picture completion web test status at 10, see value labelschilditemintegernominal 0=not started, 1=started but not completed, 2=completed successfully, 4=completed but responded randomly
jpctime1/2Picture Completion web test time elapsed at 10, secondschilditemintegerquantitative approx. 0-1000 seconds
jpcXXa1/2 (XX is the item number: p1, 01-30)Picture completion (10 year web) item XX response (grid square number, -1=timeout, - 2=discontinued, -3=credited, -4=crashed)childitem integernominal1 to 120
jpcXXs1/2 (XX is the item number: p1, 01-30)Picture completion (10 year web) item XX score, 1right 0wrongchilditem integerordinal0=incorrect, 1=correct
jpdata1/2PIAT web test completed by child at 10, 1Y 0N childitemintegernominal0=no, 1=yes
jpiatat1/2PIAT test (10 year web) mean answer time (seconds) childderiveddecimalquantitativeapprox. 0-10 seconds
jpiatt1/2PIAT (10 year web) total score, 0-82child derivedintegerscale value0 to 82
jpiatta1/2PIAT (10 year web) adjusted total score, 0-82 childderiveddecimalscale value0 to 82
jpicat1/2Picture completion test (10 year web) mean answer time (seconds)childderiveddecimalquantitative approx. 0-15 seconds
jpict1/2Picture completion (10 year web) total score, 0-30 childderivedintegerscale value0 to 30
jpq01Parent Web Qnr item 1, difficulty with maths in primary (10 year), see value labelsparentiteminteger ordinal0=none, 1=not much, 2=some, 3=quite a lot, 4=a great deal
jpq02Parent Web Qnr item 2, extra help with maths in primary (10 year), see value labelsparentiteminteger nominal0=none, 1=one-to-one support in class, 2=extra teaching help, 3=other
jpq03Parent Web Qnr item 3, self rating for maths in primary (10 year), see value labelsparentiteminteger ordinal0=above average, 1=somewhat above average, 2=average, 3=somewhat below average, 4=below average
jpq04Parent Web Qnr item 4, difficulty with maths in secondary (10 year), see value labelsparentiteminteger ordinal0=none, 1=not much, 2=some, 3=quite a lot, 4=a great deal
jpq05Parent Web Qnr item 5, how much maths in your work (10 year), see value labelsparentiteminteger nominal0=a great deal, 1=quite a lot, 2=some, 3=not much, 4=none, 5=never worked
jpq06Parent Web Qnr item 6, help children with maths HW (10 year), see value labelsparentiteminteger ordinal0=a great deal, 1=quite a lot, 2=sometimes, 3=not much, 4=never
jpq07Parent Web Qnr item 7, enjoyed maths in primary (10 year), see value labelsparentitemintegerordinal 0=loved it, 1=liked it a lot, 2=it was OK, 3=did not like it, 4=hated it
jpq08Parent Web Qnr item 8, enjoyed maths in secondary (10 year), see value labelsparentiteminteger ordinal0=loved it, 1=liked it a lot, 2=it was OK, 3=did not like it, 4=hated it
jpq09Parent Web Qnr item 9, did your sibs have problems with maths (10 year), see value labelsparentitem integernominal0=yes, 1=no, 2=not sure, 3=I do not have any siblings
jpq10Parent Web Qnr item 10, difficulty with reading in primary (10 year), see value labelsparentiteminteger ordinal0=none, 1=not much, 2=some, 3=quite a lot, 4=a great deal
jpq11Parent Web Qnr item 11, difficulty with reading in secondary (10 year), see value labelsparentitem integerordinal0=none, 1=not much, 2=some, 3=quite a lot, 4=a great deal
jpq12Parent Web Qnr item 12, how often do you read for pleasure (10 year), see value labelsparentiteminteger nominal0=daily, 1=several times a week or less, 2=weekly, 3=do not read to myself
jpq13Parent Web Qnr item 13, how often does partner read for pleasure (10 year), see value labelsparentitem integernominal0=daily, 1=several times a week or less, 2=weekly, 3=he/she doesn't read to him/herself, 4=I currently do not have a partner
jpq14Parent Web Qnr item 14, how much reading in your work (10 year), see value labelsparentiteminteger nominal0=a great deal, 1=quite a lot, 2=some, 3=not much, 4=none, 5=never worked
jpqdataTeacher questionnaire data present at 10, 1Y 0N parentitemintegernominal0=no, 1=yes
jpsess1/2PIAT web test number of sessions at 10child itemintegerquantitativeapprox. 1-10
jpstat1/2PIAT web test status at 10, see value labels childitemintegernominal0=not started, 1=started but not completed, 2=completed successfully, 4=completed but responded randomly
jptime1/2PIAT web test time elapsed at 10, seconds childitemintegerquantitativeapprox. 50-4000 seconds
jpXXa1/2 (XX is the item number: r4, r5, p1-p5, t19-t100)PIAT (10 year web) item XX answer selected, see value labelschild itemintegernominal1 to 4
jpXXs1/2 (XX is the item number: r4, r5, p1-p5, t19-t100)PIAT (10 year web) item r4 score, 1right 0wrongchilditem integerordinal0=incorrect, 1=correct
jq01a1/2Twin web questionnaire (10 year) item 01, computer at home, 1Y 2Nchilditemintegernominal 1=yes, 2=no
jq02a1/2Twin web questionnaire (10 year) item 02, newspapers, 1Y 2N 3DKchilditemintegernominal 1=yes, 2=no, 3=don't know
jq03a1/2Twin web questionnaire (10 year) item 03, TV on school day, see value labelschilditeminteger ordinal1=none, 2=one hour or less, 3=two or three hours, 4=more than three hours
jq04a1/2Twin web questionnaire (10 year) item 04, books at home, see value labelschilditeminteger ordinal1=few (0-10), 2=enough to fill one shelf (11-25), 3=enough to fill one bookcase (26-100), 4=enough to fill several bookcases (more than 100)
jq05a1/2Twin web questionnaire (10 year) item 05, talk about school at home, see value labelschilditeminteger ordinal1=never or hardly ever, 2=once every week, 3=about once a week, 4=two or three times a week, 5=every day
jq06a1/2Twin web questionnaire (10 year) item 06, maths from text books at school, see value labelschilditem integerordinal1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jq07a1/2Twin web questionnaire (10 year) item 07, maths in groups at school, see value labelschilditem integerordinal1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jq08a1/2Twin web questionnaire (10 year) item 08, rulers etc at school, see value labelschilditeminteger ordinal1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jq09a1/2Twin web questionnaire (10 year) item 09, talk about maths at school, see value labelschilditeminteger ordinal1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jq10a1/2Twin web questionnaire (10 year) item 10, maths homework per day, see value labelschilditem integerordinal1=none, 2=fifteen minutes, 3=thirty minutes, 4=forty five minutes or more
jq11a1/2Twin web questionnaire (10 year) item 11, talk about something read, see value labelschilditeminteger ordinal1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jq12a1/2Twin web questionnaire (10 year) item 12, read for fun, see value labelschilditemintegerordinal 1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jq13a1/2Twin web questionnaire (10 year) item 13, pages read per day, see value labelschilditeminteger ordinal1=none, 2=one to five, 3=six to ten, 4=more than ten
jq14a1/2Twin web questionnaire (10 year) item 14, talk about reading at school, see value labelschilditem integerordinal1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jq15a1/2Twin web questionnaire (10 year) item 15, write about reading at school, see value labelschilditem integerordinal1=never or hardly ever, 2=once or twice a month, 3=once or twic a week, 4=almost every day
jqdata1/2Child web questionnaire completed by child at 10, 1Y 0Nchilditemintegernominal0=no, 1=yes
jqnrat1/2Maths and reading questionnaire (10 year web) mean answer time (seconds)childderiveddecimal quantitativeapprox. 0-50 seconds
jqsess1/2Child web questionnaire number of sessions at 10 childitemintegerquantitativeapprox. 1-4
jqstat1/2Child web questionnaire status at 10, see value labels childitemintegernominal0=not started, 1=started but not completed, 2=completed successfully
jqtime1/2Child web questionnaire time elapsed at 10, seconds childitemintegerquantitativeapprox. 0-1000 seconds
jravnat1/2Raven test (10 year web) mean answer time (seconds) childderiveddecimalquantitativeapprox. 0-50 seconds
jravt1/2Raven (10 year web) overall total score, 0-60 childderivedintegerscale value0 to 60
jravta1/2Raven (10 year web) adjusted overall total score, 0-60 childderiveddecimalscale value0 to 60
jrcatat1/2Raven (10 year web) Category A total score, 0-12 childderivedintegerscale value0 to 12
jrcatbt1/2Raven (10 year web) Category B total score, 0-12 childderivedintegerscale value0 to 12
jrcatct1/2Raven (10 year web) Category C total score, 0-12 childderivedintegerscale value0 to 12
jrcatdt1/2Raven (10 year web) Category D total score, 0-12 childderivedintegerscale value0 to 12
jrcatet1/2Raven (10 year web) Category E total score, 0-12 childderivedintegerscale value0 to 12
jrdata1/2Raven web test completed by child at 10, 1Y 0N childitemintegernominal0=no, 1=yes
jrsess1/2Raven web test number of sessions at 10child itemintegerquantitativeapprox. 1-10
jrstat1/2Raven web test status at 10, see value labels childitemintegernominal0=not started, 1=started but not completed, 2=completed successfully, 4=completed but responded randomly
jrtime1/2Raven web test time elapsed at 10, seconds childitemintegerquantitativeapprox. 0-4000 seconds
jrXYYa1/2 (X is the sub-test category A-E, YY is the item number 01-12) Raven (10 year web) item XYY answer selected, see value labelschild itemintegernominal1 to 6 (for sub-tests A, B) or 1 to 8 (for sub-tests C, D, E)
jrXYYs1/2 (X is the sub-test category A-E, YY is the item number 01-12) Raven (10 year web) item XYY score, 1right 0wrongchilditem integerordinal0=incorrect, 1=correct
jsameschTwins have same school at 10 (from admin database), 1Y 0Nadminitemintegernominal0=no, 1=yes
jsametchTwins have same teacher at 10 (from admin database), 1Y 0Nadminitemintegernominal0=no, 1=yes
jt2a1/22-subject (English, Maths) academic achievement composite (10 year teacher), standardisedteacherderived decimalscale valueapprox. -3 to +3 (standardised)
jt3a1/23-subject overall academic achievement composite (10 year teacher), standardisedteacherderiveddecimal scale valueapprox. -3 to +3 (standardised)
jtcha011/2Teacher Chaos item 1, very little noise (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha021/2Teacher Chaos item 2, always rushed (10 year), 1Y 0N teacheritemintegerordinal0=no, 1=yes
jtcha031/2Teacher Chaos item 3, on top of things (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha041/2Teacher Chaos item 4, always running late (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha051/2Teacher Chaos item 5, a real zoo (10 year), 1Y 0N teacheritemintegerordinal0=no, 1=yes
jtcha061/2Teacher Chaos item 6, talk without interruption (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha071/2Teacher Chaos item 7, distracting events (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha081/2Teacher Chaos item 8, plans do not work out (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha091/2Teacher Chaos item 9, can usually find things (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha101/2Teacher Chaos item 10, cannot hear yourself think (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha111/2Teacher Chaos item 11, a relaxing place (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha121/2Teacher Chaos item 12, interruptions make it difficult (10 year), 1Y 0Nteacheriteminteger ordinal0=no, 1=yes
jtcha131/2Teacher Chaos item 13, atmosphere is calm (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha141/2Teacher Chaos item 14, always untidy (10 year), 1Y 0N teacheritemintegerordinal0=no, 1=yes
jtcha151/2Teacher Chaos item 15, too many children (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcha161/2Teacher Chaos item 16, many adults in and out (10 year), 1Y 0Nteacheritemintegerordinal 0=no, 1=yes
jtcla11/2Teacher Classroom item 1, likes to be (10 year), see value labelsteacheritemintegerordinal 0=not true, 1=somewhat true, 2=certainly true
jtcla21/2Teacher Classroom item 2, friends care about work (10 year), see value labelsteacheriteminteger ordinal0=not true, 1=somewhat true, 2=certainly true
jtcla31/2Teacher Classroom item 3, has fun (10 year), see value labelsteacheritemintegerordinal 0=not true, 1=somewhat true, 2=certainly true
jtcla41/2Teacher Classroom item 4, friends try their best (10 year), see value labelsteacheriteminteger ordinal0=not true, 1=somewhat true, 2=certainly true
jtcla51/2Teacher Classroom item 5, friends enjoy learning (10 year), see value labelsteacheriteminteger ordinal0=not true, 1=somewhat true, 2=certainly true
jtcla61/2Teacher Classroom item 6, feels happy (10 year), see value labelsteacheritemintegerordinal 0=not true, 1=somewhat true, 2=certainly true
jtcla71/2Teacher Classroom item 7, feels proud (10 year), see value labelsteacheritemintegerordinal 0=not true, 1=somewhat true, 2=certainly true
jtcla81/2Teacher Classroom item 8, friends often in trouble (10 year), see value labelsteacheriteminteger ordinal0=not true, 1=somewhat true, 2=certainly true
jtclcha1/2Classroom chaos scale (teacher at 10), 0-1 teacherderiveddecimalscale value0 to 1
jtclpec1/2Classroom peer context scale (teacher at 10), 0-2 teacherderiveddecimalscale value0 to 2
jtclsat1/2Classroom satisfaction scale (teacher at 10), 0-2 teacherderiveddecimalscale value0 to 2
jtdata1/2Teacher questionnaire data present at 10, 1Y 0N teacheritemintegernominal0=no, 1=yes
jte1/2English achievement composite (10 year teacher), standardisedteacherderiveddecimalscale valueapprox. -3 to +3 (standardised)
jtengre1/2Teacher NC Rating at 10: English Reading, level 1 to 5teacheritemintegerordinal1-5 (National Curriculum levels)
jtengsp1/2Teacher NC Rating at 10: English Speaking and Listening, level 1 to 5teacheriteminteger ordinal1-5 (National Curriculum levels)
jtengwr1/2Teacher NC Rating at 10: English Writing, level 1 to 5teacheritemintegerordinal1-5 (National Curriculum levels)
jtenyearParent web questionnaire data present at 10, 1Y 0N parent, child, teacherderivedintegernominal 0=no, 1=yes
jtgoo011/2Teacher How Good item 1, paying attention (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo021/2Teacher How Good item 2, following spoken directions (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo031/2Teacher How Good item 3, remembering things people say (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo041/2Teacher How Good item 4, following what people say (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo051/2Teacher How Good item 5, understanding words (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo061/2Teacher How Good item 6, understanding new ideas (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo071/2Teacher How Good item 7, establishing eye contact (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo081/2Teacher How Good item 8, understanding facial expressions (10 year), see value labelsteacheritem integerordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo091/2Teacher How Good item 9, answering questions (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo101/2Teacher How Good item 10, formulating questions (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo111/2Teacher How Good item 11, variety of vocabulary (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo121/2Teacher How Good item 12, finding the right word (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo131/2Teacher How Good item 13, expressing thoughts (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo141/2Teacher How Good item 14, describing things (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo151/2Teacher How Good item 15, staying on the subject (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo161/2Teacher How Good item 16, getting to the point (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo171/2Teacher How Good item 17, putting events in the right order (10 year), see value labelsteacheritem integerordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo181/2Teacher How Good item 18, using good grammar (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo191/2Teacher How Good item 19, talking complete sentences (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo201/2Teacher How Good item 20, talking fluently (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo211/2Teacher How Good item 21, expanding an answer when talking (10 year), see value labelsteacheritem integerordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo221/2Teacher How Good item 22, starting a conversation (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo231/2Teacher How Good item 23, taking turns in conversation (10 year), see value labelsteacheritem integerordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo241/2Teacher How Good item 24, staying on topic (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo251/2Teacher How Good item 25, talking with a group (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo261/2Teacher How Good item 26, saying something another way (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo271/2Teacher How Good item 27, sounding out new words (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo281/2Teacher How Good item 28, understanding what was read (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo291/2Teacher How Good item 29, explaining what was read (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo301/2Teacher How Good item 30, identifying main ideas (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo311/2Teacher How Good item 31, remembering details (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo321/2Teacher How Good item 32, following written directions (10 year), see value labelsteacheritem integerordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo331/2Teacher How Good item 33, writing down thoughts (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo341/2Teacher How Good item 34, good grammar when writing (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo351/2Teacher How Good item 35, writing complete sentences (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo361/2Teacher How Good item 36, writing fluently (10 year), see value labelsteacheriteminteger ordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo371/2Teacher How Good item 37, expanding an answer when writing (10 year), see value labelsteacheritem integerordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtgoo381/2Teacher How Good item 38, writing words in the right order (10 year), see value labelsteacheritem integerordinal1=very good, 2=quite good, 3=doing OK, 4=not so good, 5=not at all good
jtm1/2Maths achievement composite (10 year teacher), standardisedteacherderiveddecimalscale valueapprox. -3 to +3 (standardised)
jtmatnu1/2Teacher NC Rating at 10: Maths Number and Algebra, level 1 to 5teacheritemintegerordinal 1-5 (National Curriculum levels)
jtmatsh1/2Teacher NC Rating at 10: Maths Shape Space and Measures, level 1 to 5teacheriteminteger ordinal1-5 (National Curriculum levels)
jtmatus1/2Teacher NC Rating at 10: Maths Using and Applying, level 1 to 5teacheritemintegerordinal 1-5 (National Curriculum levels)
jtottm1/2Total time for all 10 year web tests if finished (minutes)childderiveddecimalquantitative approx. 0-200 minutes
jtqage1/2Age of twin (years) when 10yr teacher questionnaire returnedteacherderiveddecimal quantitativeapprox. 9.4 to 11 years
jtqLLCage1Age of twin when 10yr teacher questionnaire returned (for use in LLC TRE), months teacherderivedinteger quantitativeapprox. 113 to 128 (months)
jtqLLCdate1Date when 10yr teacher questionnaire returned (for use in LLC TRE), yyyy-mm string teacherderivedstring date valueapprox. '2004-05' to '2005-06'
jts1/2Science achievement composite (10 year teacher), standardisedteacherderiveddecimalscale valueapprox. -3 to +3 (standardised)
jtscili1/2Teacher NC Rating at 10: Science Life Processes, level 1 to 5teacheritemintegerordinal 1-5 (National Curriculum levels)
jtsciph1/2Teacher NC Rating at 10: Science Physical Processes, level 1 to 5teacheritemintegerordinal 1-5 (National Curriculum levels)
jtscisc1/2Teacher NC Rating at 10: Scientific Enquiry, level 1 to 5teacheritemintegerordinal 1-5 (National Curriculum levels)
jtsen1/2Teacher at 10: has a current Statement of SEN, 1Y 0N teacheritemintegernominal0=no, 1=yes
jtsenrg1/2Teacher at 10: on the SEN Register, 1Y 0N teacheritemintegernominal0=no, 1=yes
jvdata1/2Vocab web test completed by child at 10, 1Y 0N childitemintegernominal0=no, 1=yes
jvocat1/2Vocab test (10 year web) mean answer time (seconds) childderiveddecimalquantitativeapprox. 0-50 seconds
jvoct1/2Vocabulary (10 year web) total score, 0-60 childderivedintegerscale value0 to 60
jvocta1/2Vocabulary (10 year web) adjusted total score, 0-60 childderiveddecimalscale value0 to 60
jvsess1/2Vocab web test number of sessions at 10child itemintegerquantitativeapprox. 1-5
jvstat1/2Vocabulary web test status at 10, see value labels childitemintegernominal0=not started, 1=started but not completed, 2=completed successfully, 4=completed but responded randomly
jvtime1/2Vocab web test time elapsed at 10, seconds childitemintegerquantitativeapprox. 0-1500 seconds
jvXXa1/2 (XX is the item number, 01-30)Vocab (10 year web) item XX answer selected, see value labelschilditem integernominal1 to 3 (items 1-5) or 1-4 (items 6-30)
jvXXs1/2 (XX is the item number, 01-30)Vocab (10 year web) item XX score, 2right 1partly right 0wrongchilditem integerordinal0=incorrect, 1=partially correct (second-best answer), 2=correct (best answer)