Reaction times and intelligence differences - A population-based cohort study

Citation
Ij. Deary et al., Reaction times and intelligence differences - A population-based cohort study, INTELLIGENC, 29(5), 2001, pp. 389-399
Citations number
36
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Psycology
Journal title
INTELLIGENCE
ISSN journal
0160-2896 → ACNP
Volume
29
Issue
5
Year of publication
2001
Pages
389 - 399
Database
ISI
SICI code
0160-2896(2001)29:5<389:RTAID->2.0.ZU;2-J
Abstract
The association between reaction times and psychometric intelligence test s cores is a major plank of the information-processing approach to mental abi lity 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 Par t I total scores correlated -.31 with simple reaction time, -.49 with four- choice reaction time, and -.26 with intraindividual variability in both rea ction time procedures. The correlation between AH4 scores and the differenc e between simple and four-choice reaction time was -.15. Separate analyses were conducted after partitioning the total group according to sex, educati onal 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 intellige nce in a large, normal sample of the population. It provides a benchmark fo r other studies and suggests larger effect sizes than the majority of prese nt studies, which are dominated by young student samples. (C) 2001 Elsevier Science Inc. All rights reserved.