Genetics of cognition

Outline of a collaborative twin study

M. Wright, E. D. Geus, Jyukou Andou, M. Luciano, D. Posthuma, Y. Ono, N. Hansell, C. V. Baal, Kai Hiraishi, T. Hasegawa, G. Smith, G. Geffen, L. Geffen, S. Kanba, A. Miyake, N. Martin, D. Boomsma

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

A multidisciplinary collaborative study examining cognition in a large sample of twins is outlined. A common experimental protocol and design is used in The Netherlands, Australia and Japan to measure cognitive ability using traditional IQ measures (i.e., psychometric IQ), processing speed (e.g., reaction time [RT] and inspection time [IT]), and working memory (e.g., spatial span, delayed response [DR] performance). The main aim is to investigate the genetic covariation among these cognitive phenotypes in order to use the correlated biological markers in future linkage and association analyses to detect quantitative-trait loci (QTLs). We outline the study and methodology, and report results from our preliminary analyses that examines the heritability of processing speed and working memory indices, and their phenotypic correlation with IQ. Heritability of Full Scale IQ was 87% in the Netherlands, 83% in Australia, and 71% in Japan. Heritability estimates for processing speed and working memory indices ranged from 33-64%. Associations of IQ with RT and IT (-0.28 to -0.36) replicated previous findings with those of higher cognitive ability showing faster speed of processing. Similarly, significant correlations were indicated between IQ and the spatial span working memory task (storage [0.31], executive processing [0.37]) and the DR working memory task (0.25), with those of higher cognitive ability showing better memory performance. These analyses establish the heritability of the processing speed and working memory measures to be used in our collaborative twin study of cognition, and support the findings that individual differences in processing speed and working memory may underlie individual differences in psychometric IQ.

Original languageEnglish
Pages (from-to)48-56
Number of pages9
JournalTwin Research
Volume4
Issue number1
DOIs
Publication statusPublished - 2001

Fingerprint

Twin Studies
Short-Term Memory
Cognition
Aptitude
Psychometrics
Individuality
Netherlands
Reaction Time
Japan
Quantitative Trait Loci
Research Design
Biomarkers
Phenotype

ASJC Scopus subject areas

  • Genetics(clinical)
  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynaecology

Cite this

Wright, M., Geus, E. D., Andou, J., Luciano, M., Posthuma, D., Ono, Y., ... Boomsma, D. (2001). Genetics of cognition: Outline of a collaborative twin study. Twin Research, 4(1), 48-56. https://doi.org/10.1375/1369052012146

Genetics of cognition : Outline of a collaborative twin study. / Wright, M.; Geus, E. D.; Andou, Jyukou; Luciano, M.; Posthuma, D.; Ono, Y.; Hansell, N.; Baal, C. V.; Hiraishi, Kai; Hasegawa, T.; Smith, G.; Geffen, G.; Geffen, L.; Kanba, S.; Miyake, A.; Martin, N.; Boomsma, D.

In: Twin Research, Vol. 4, No. 1, 2001, p. 48-56.

Research output: Contribution to journalArticle

Wright, M, Geus, ED, Andou, J, Luciano, M, Posthuma, D, Ono, Y, Hansell, N, Baal, CV, Hiraishi, K, Hasegawa, T, Smith, G, Geffen, G, Geffen, L, Kanba, S, Miyake, A, Martin, N & Boomsma, D 2001, 'Genetics of cognition: Outline of a collaborative twin study', Twin Research, vol. 4, no. 1, pp. 48-56. https://doi.org/10.1375/1369052012146
Wright, M. ; Geus, E. D. ; Andou, Jyukou ; Luciano, M. ; Posthuma, D. ; Ono, Y. ; Hansell, N. ; Baal, C. V. ; Hiraishi, Kai ; Hasegawa, T. ; Smith, G. ; Geffen, G. ; Geffen, L. ; Kanba, S. ; Miyake, A. ; Martin, N. ; Boomsma, D. / Genetics of cognition : Outline of a collaborative twin study. In: Twin Research. 2001 ; Vol. 4, No. 1. pp. 48-56.
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