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Titolo:
THE GENETIC-BASIS OF THE RELATION BETWEEN SPEED-OF-INFORMATION-PROCESSING AND IQ
Autore:
RIJSDIJK FV; VERNON PA; BOOMSMA DI;
Indirizzi:
RIJKS UNIV GRONINGEN,DEPT SOCIAL PSYCHIAT,POB 30001 NL-9700 RB GRONINGEN NETHERLANDS VRIJE UNIV AMSTERDAM,DEPT PSYCHONOM AMSTERDAM NETHERLANDS UNIV WESTERN ONTARIO,DEPT PSYCHOL LONDON ON CANADA
Titolo Testata:
Behavioural brain research
fascicolo: 1, volume: 95, anno: 1998,
pagine: 77 - 84
SICI:
0166-4328(1998)95:1<77:TGOTRB>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELEMENTARY COGNITIVE TASKS; NERVE CONDUCTION-VELOCITY; TWINS REARED APART; ENVIRONMENTAL-INFLUENCES; GENERAL INTELLIGENCE; HERITABILITY;
Keywords:
REACTION TIMES; WAIS; RAVEN; TWINS; MULTIVARIATE GENETIC ANALYSES; STRUCTURAL EQUATION MODELING; HERITABILITY; IQ;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
F.V. Rijsdijk et al., "THE GENETIC-BASIS OF THE RELATION BETWEEN SPEED-OF-INFORMATION-PROCESSING AND IQ", Behavioural brain research, 95(1), 1998, pp. 77-84

Abstract

The relationship of speed-of-information-processing (SIP), as derivedfrom reaction times (RTs) on experimental tasks, and intelligence hasbeen extensively studied. SIP is suggested to measure the efficiency with which subjects can perform basic cognitive operations underlying a wide range of intellectual abilities. Observed phenotypic correlations between RT and IQ typically are in the -0.2 to -0.4 range, and the question is addressed to what extent this relationship is determined by genetic or environmental influences. In a group of Dutch twins the heritabilities for RT tasks at age 16 and 18 years were estimated longitudinally and the nature of the RT-IQ relationship was investigated. At age 16 years heritabilities for a simple reaction time (SRT) and choice reaction time (CRT) were 64 and 62% and the average phenotypic correlations between the RTs and IQ, assessed by the Raven standard progressive matrices, was -0.21. At the second test occasion lower heritabilities were observed for the RTs, probably due to modifications in administration procedures. The mean correlations between the RTs and WAISverbal and per formal subtests were -0.18 and -0.16. Multivariate genetic analyses at both ages showed that the RT-IQ correlations were explained by genetic influences. These results are in agreement with earlier findings (Baker et al., Behav Genet 1991;21:351-67; Ho et al., Behav Genet 1988;18:247-61) and support the existence of a common, heritable biological basis underlying the SIP-IQ relationship. (C) 1998 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 21:49:05