Document Type

Article - postprint


Psychology (Pitzer)

Publication Date



Adoption, Heritability, IQ, Nature and nurture


There is a deeper assumption underlying adoption studies that is often not acknowledged by either adoption study researchers or their critics, and it is an assumptions that is at least as important as the two considered by Richardson and Norgate: the assumption that the heritability statistics generated by adoption studies are informative about something of consequence. Although Richardson and Norgate’s paper presents several valid criticisms of adoption studies of IQ that lead them to suggest a ‘radical reappraisal’ of such studies, a reappraisal even more radical than the one they suggest might, in fact, be warranted.


The content of this open-access post-print article is the same as that contained in the published article with the following reference:

Moore, D. S. (2006). A very little bit of knowledge: Re-evaluating the meaning of the heritability of IQ. Human Development, 49, 347 – 353.

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© 2006 S. Karger AG, Basel

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