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How children develop is fascinating. The scientific study of child development is helping improve children’s lives, through improved understanding, better interventions and better policy

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A short blog about a blog: more reasons why national IQ databases are not useful

A recent blog by Russel T Warne (https://russellwarne.com/2020/07/19/thoughts-on-low-national-iqs-intellectual-disability-and-data-quality/) makes some sensible points that appear to have been prompted by some of the furore associated with the now-retracted Clark et al paper that colleagues and I critiqued recently. He begins by saying that IQ scores do not measure intelligence with great validity, that IQ scores areContinue reading “A short blog about a blog: more reasons why national IQ databases are not useful”

Measurement and analytic issues in longitudinal and cross-national data: Illustrations from the retracted work of Clark et al. (2020)

We (Manuel Eisner and Pasco Fearon) wrote a letter in June 2020 to Psychological Science responding to the publication of the above paper. We drew attention to the fact that the data the authors used for estimating homicide rates were quite profoundly problematic. We also noted a number of serious statistical problems. We pointed outContinue reading “Measurement and analytic issues in longitudinal and cross-national data: Illustrations from the retracted work of Clark et al. (2020)”

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