European Journal of Personality Eur. J. Pers. 21: 707–765 (2007) Published online in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/per.648 Discussion on ’The g-Factor of International Cognitive Ability Comparisons: The Homogeneity of Results in PISA, TIMSS, PIRLS and IQ-Tests Across Nations’ by Heiner Rindermann OPEN PEER COMMENTARY Geographical Distribution of Mental Abilities and Its Moral Consequences JU¨ RI ALLIK Department of Psychology, University of Tartu, Estonia
[email protected] Abstract Rindermann’s study provides the most comprehensive evidence so far that national scores of school assessment have systematic differences and the geographical distribution of these differences almost perfectly repeat the distribution of the mean national scores of intelligence. It is argued that without comparison with the random effects of statistical aggregation it is impossible to decide whether additional factors are needed to explain the strong association between national scores of school assessment and intelligence tests. The ignorance about real differences in mental abilities may become a source of social injustice because this does not allow natural inequalities to be arranged such that they are to the greatest benefit of the least advantageous. Copyright # 2007 John Wiley & Sons, Ltd. Rindermann (this issue) provides the most comprehensive evidence so far that national scores of school assessment have systematic differences and the geographical distribution of these differences almost perfectly repeat the distribution of the mean national scores of intelligence. By analogy with many previous controversial discoveries, it is predictable that the first most typical reaction would be denial. Indeed, many critics are not able to tolerate the idea that the mean level of intelligence could systematically vary across countries and world regions.