Twin studies

... discussed in a couple of books. More interestingly though, subsequent twin studies have reached similar findings to Burt. Behavioural traits are significantly heritable. ...

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... Sources of human psychological differences: The Minnesota study of twins reared apart. Science, 250, 223-228. Brigham, C. C. (1923). A study ... J. B. (1993). Human cognitive abilities: A survey of factor-analytic studies. New York: Cambridge University Press. Carroll, J. B. (1995). Reflections ...

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... behavior, (7) between-group heritabilities, inter-racial adoption studies, and IQ (8) why evolutionary theory predicts group differences, and ... psychologist who reported a heritability for IQ of 77% for identical twins reared apart. Subsequently, he was widely accused of fabricating his ...

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I think the last one in the second post is already validated by twin studies, so I think it's true.

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... The conclusions from studies involving intelligence tests often conclude that intelligence has high heritability. This is probably due to inherent problems with human twin studies, as well as reflecting a high level of genetic variation for ...

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