Lynn R, Hampson S, Agahi E
Department of Psychology, University of Ulster, Coleraine, Northern Ireland, UK.
Br J Psychol. 1989 Nov;80 ( Pt 4):499-507. doi: 10.1111/j.2044-8295.1989.tb02338.x.
The theory that shared family environment has an effect on intelligence but no effect on personality was examined by a study of correlations between young adolescent Irish siblings for intelligence, neuroticism, extraversion and psychoticism. The correlations obtained for 386 sibling pairs were 0.48 (intelligence), 0.06 (neuroticism), 0.31 (extraversion) and 0.14 (psychoticism). The correlation for IQ confirms the operation of both genetic and shared family effects on intelligence. The low correlations for neuroticism and psychoticism confirm the thesis that shared family effects have no influence on these traits. They are also inconsistent with an additive genetic model and suggest that non-additive genetic mechanisms are present to make siblings so dissimilar. The higher sibling correlation for extraversion suggests that shared family environment does have some effect on this trait among young adolescents and is also consistent with an additive genetic model.
一项针对爱尔兰青少年兄弟姐妹在智力、神经质、外向性和精神质方面的相关性研究，检验了共享家庭环境对智力有影响但对人格无影响这一理论。对386对兄弟姐妹的相关性分析结果为：智力方面为0.48，神经质方面为0.06，外向性方面为0.31，精神质方面为0.14。智商的相关性证实了基因和共享家庭环境对智力的共同作用。神经质和精神质的低相关性证实了共享家庭环境对这些特质没有影响这一论点。它们也与加性遗传模型不一致，表明存在非加性遗传机制使兄弟姐妹如此不同。外向性方面较高的兄弟姐妹相关性表明，共享家庭环境对青少年的这一特质确实有一定影响，并且也与加性遗传模型一致。
