Skip to content
Closer - The home of longitudinal research

NSHD – Age 15 – The Alice Heim Group Ability Test (AH4)

The MRC National Survey of Health of Development (NSHD) assessed their cohort members (CMs) during the study’s age 15 sweep using the Alice Heim Group Ability Test.

Details on this measure and the data collected from the CMs are outlined in the table below.

Domain:Verbal and non-verbal ability
Measures:General ability
Verbal ability
Non-verbal ability
General sequential reasoning
Quantitative Reasoning
CHC:Gf (fluid intelligence)
Gc (crystallised intelligence)
G (general ability)
Administration method:Teacher; face to face; pen and paper
Procedure:The AH4 contains 130 items, with 65 items each measuring verbal and non-verbal ability. The items include series completion, mental arithmetic, vocabulary, and reasoning by analogy. Participants were given 10 practice items before the non-verbal section, and 12 practice items before the verbal section. Raw and normalised scores (comparable to a standard IQ score) are available. The total time of administration was approximately 30 minutes.
Link to questionnaire: (opens in new tab)
Scoring:One point per correct answer; 0 - 65 (verbal/non-verbal); 0 - 135 (general)
Item-level variable(s):Not currently available
Total score/derived variable(s):GA15R, GA15R61, NV15R, NV15R61, V15R, V15R61, GA1561, GA15N, NV1561, NV15N, V1561, V15N
Descriptives:Raw scoreNormalised score
N = 4,019N = 4,017
Range = 0 - 125Range = 47 - 153
Mean = 73.96Mean = 101.88
SD = 20.19SD = 15.26
(click image to enlarge)
(click image to enlarge)
Age of participants (months):Mean = 174.54, SD = 2.12, Range = 172 - 182
Other sweep and/or cohort:None
Source:Heim, A. W. (1955). Manual for the Group test of General Intelligence AH4. London, England: National Foundation for Educational Research.
Technical resources:Pigeon DA. Details of the fifteen years tests. In: Douglas JWB, Ross JM, Simpson HR, eds. All Our Future. London: Davies, 1968; Appendix 1.
Reference examples:Richards, M., Shipley, B., Fuhrer, R., & Wadsworth, M. E. (2004). Cognitive ability in childhood and cognitive decline in mid-life: longitudinal birth cohort study. BMJ, 328(7439), 552.
Cooper, R., Richards, M., & Kuh, D. (2017). Childhood cognitive ability and age-related changes in physical capability from midlife: Findings from a British birth cohort study. Psychosomatic Medicine, 79(7), 785.

Go to:

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