Premium
The Impact of Child IQ, Parent IQ and Sibling IQ on Child Behavioural Deviance Scores
Author(s) -
Goodman Robert,
Simonoff Emily,
Stevenson Jim
Publication year - 1995
Publication title -
journal of child psychology and psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.652
H-Index - 211
eISSN - 1469-7610
pISSN - 0021-9630
DOI - 10.1111/j.1469-7610.1995.tb01299.x
Subject(s) - psychology , sibling , intelligence quotient , developmental psychology , deviance (statistics) , clinical psychology , psychiatry , cognition , statistics , mathematics
In an epidemiological sample of 411 l3‐year‐old twins of normal intelligence, both parents and teachers reported more behavioural problems among children with lower IQs. This was not attributable to the effects of parental IQ or social class and WAS not entirely mediated by lower scholastic attainments. Different causal models are discussed: “rater bias” and “IQ is a consequence” explanations seem less plausible than “IQ is a cause” and “IQ is a maker” explanations. Higher parental IQ was associated with more emotional symptoms in the child, both by parental and school report There was no evidence that being brighter or less bright than a (twin) sibling influenced behavioural deviance, casting doubt on the importance of contrast effects.