Why g Is Not an Adaptation: A Comment on Kanazawa (2004)

摘要

In S. Kanazawa's (2004) evolutionary theory of general intelligence (g), g is presented as a species-typical information-processing mechanism. This conceptualization of g departs radically from the accepted conceptualization of g as a source of individual differences that is manifest in the positive manifold. Kanazawa's theory is thus problematic in the sense that it concerns a purely hypothetical, and empirically unsupported, conceptualization of g. The authors argue that an evolutionary account of g should address it as a source of individual differences—that is, in a manner that is consistent with the empirical support for g.