Genetic analysis of IQ, processing speed and stimulus-response incongruency effects

被引：38

作者：

Posthuma, D ^{[1
]}

Mulder, EJCM ^{[1
]}

Boomsma, DI ^{[1
]}

de Geus, EJC ^{[1
]}

机构：

[1] Free Univ Amsterdam, Dept Biol Psychol, NL-1081 BT Amsterdam, Netherlands

来源：

BIOLOGICAL PSYCHOLOGY | 2002年 / 61卷 / 1-2期

关键词：

intelligence; endophenotype; lateralized readiness potential (LRP); heritability; genetic correlation;

D O I：

10.1016/S0301-0511(02)00057-1

中图分类号：

B84 [心理学];

学科分类号：

04 ; 0402 ;

摘要：

Psychometric IQ (WAIS-III), onset and peak latency of the lateralized readiness potential (LRP), decision time, and accuracy were assessed during an Eriksen Flanker task in a young (149 families) and in an older (122 families) cohort of twins and their siblings. Stimulus-response incongruency effects were found on all measures of processing speed and accuracy. The effects on the percentages of wrong button presses and too slow ( > 1000 ms) responses were larger in the older than in the younger age cohort. Significant heritability was found for processing speed (33-48%), accuracy (41%), and stimulus-response incongruency effects (332%). Verbal and performance IQ correlated significantly with stimulus-response incongruency effects on accuracy (-0.22 to -0.39), and this correlation was completely mediated by an underlying set of common genes. It is concluded that measures of the ability to perform well under conditions of stimulus-response incongruency are viable endophenotypes of cognitive ability. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：157 / 182

页数：26

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