Brief Communications Arising | Published:


Is there a sex difference in IQ scores?

Naturevolume 442pageE1 (2006) | Download Citation



Arising from: S. Blinkhorn Nature 438, 31-32 (2005); Blinkhorn replies.

Steve Blinkhorn1criticizes our study2 of samples of university students, in which we found that the average IQ of men is 4.6 points higher than that of women, as measured by the Progressive (or Raven's) Matrices. He maintains that there is a negligible sex difference in adult intelligence. We believe that the principal error of Blinkhorn's criticism is that he does not consider our result in the context of several other studies showing that adult males have an IQ advantage of around 4–6 IQ points3,4,5,6,7.

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  1. Manchester Business School, University of Manchester, Booth Street West, Manchester, M15 6PB, UK

    • Paul Irwing
  2. School of Psychology, University of Ulster, Coleraine, BT52 1SA, Northern Ireland, UK

    • Richard Lynn


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Correspondence to Paul Irwing.

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