Similarity in cognitive ability measurement at age 14-16

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Explore where selected cohorts overlapped in their assessment of cognitive abilities at the ages of 14 to 16.

For background guidance on the table below, see the main harmonisation feasibility page in this guide.

Ability domainNSHD (Age 15)NCDS (Age 16)BCS70 (Age 16)ALSPAC (Age 15)MCS (Age 14)
Gc (Crystallised ability)AH4 verbal abilityVocabulary (APU)Vocabulary (WASI)Vocabulary (APU)
Gc/Grw (Crystallised ability/ Reading & writing)Watts-Vernon Reading TestReading Comprehension (NFER)Edinburgh Reading Test (ERT)
Spelling test
Gf (Fluid ability)AH4 non-verbal abilityMatrices (BAS)Matrix Reasoning (WASI)
Gq (Quantitative knowledge)Mathematics TestMathematics (NFER)Arithmetic (APU)
Gt (Decision speed)Inhibition (Stop-signal) TaskCambridge Gambling Task (CANTAB)

Additional detail on the individual measures is available in the childhood cognition section of this guide.

Explanations of the ability domains are provided in the introductory section.


Explore where similar cognitive abilities have been measured across the studies at other ages:

Explore the full set of cognitive abilities assessed by each of the cohort studies in this guide:


This page is part of CLOSER’s ‘A guide to the cognitive measures in five British birth cohort studies’.