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Reaction time and intelligence differences: a population based cohort study

Deary, I., Der, G., and Ford, G. (2001) Reaction time and intelligence differences: a population based cohort study. Intelligence, 29 (5). pp. 389-399. ISSN 0160-2896 (doi:10.1016/S0160-2896(01)00062-9)

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Publisher's URL: http://dx.doi.org/10.1016/S0160-2896(01)00062-9

Abstract

The association between reaction times and psychometric intelligence test scores is a major plank of the information-processing approach to mental ability differences. An important but unavailable datum is the effect size of the correlation in the normal population. Here we describe the associations between scores on a test of general mental ability (Alice Heim 4, AH4) and reaction times using a ‘Hick’-style device. The sample is 900 people aged 56 years who are broadly representative of the Scottish population. AH4 Part I total scores correlated −.31 with simple reaction time, −.49 with four-choice reaction time, and −.26 with intraindividual variability in both reaction time procedures. The correlation between AH4 scores and the difference between simple and four-choice reaction time was −.15. Separate analyses were conducted after partitioning the total group according to sex, educational level, social class grouping, and number of errors on the four-choice reaction time task. None of these factors significantly altered the effect sizes. This is the first report of reaction time and psychometric intelligence in a large, normal sample of the population. It provides a benchmark for other studies and suggests larger effect sizes than the majority of present studies, which are dominated by young student samples.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Der, Mr Geoffrey
Authors: Deary, I., Der, G., and Ford, G.
Subjects:B Philosophy. Psychology. Religion > BF Psychology
College/School:College of Medical Veterinary and Life Sciences > School of Medicine > Centre for Population and Health Sciences
College of Medical Veterinary and Life Sciences > Institute of Health and Wellbeing > MRC/CSO Unit
Journal Name:Intelligence
ISSN:0160-2896

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