The S factor in the British Isles: A reanalysis of Lynn (1979)

Read the study PDF. Emil O. W. Kirkegaard, Ulster Institute for Social Research. Email: emil@emilkirkegaard.dk Abstract I reanalyze data reported by Richard Lynn in a 1979 paper concerning IQ and socioeconomic…

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Spearman’s hypothesis on item-level data from Raven’s Standard Progressive Matrices: A replication and extension

Emil O. W. Kirkegaard1 Abstract Item-level data from Raven’s Standard Progressive Matrices was compiled for 12 diverse groups from previously published studies. Jensen’s method (method of correlated vectors) was used…

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International differences in intelligence can be confusing: A commentary on Harrison et al (2015)

Abstract In this commentary I explain how mean differences between normal distributions give rise to different percentages of the populations being above or below a given threshold, depending on where…

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Opinions about nuclear energy and global warming, and wordsum intelligence

Abstract Using data from the ANES 2012 survey, I investigate the relationship between wordsum IQ estimates (unweighted sums, factor analytic and item-response theory scores) and opinions about nuclear energy and…

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Review: The Righteous Mind: Why Good People are Divided by Politics and Religion (Jonathan Haidt)

https://www.goodreads.com/book/show/11324722-the-righteous-mind I had heard good things about this book, sort of. It has been cited a lot. Enough that I would be wiling to read it, given that the author…

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