No special sex-linked inheritance of cognitive ability/intelligence (except for a few rare disorders)

Some guy on SSC: I remember hearing somewhere that the IQ of the mother is what determines the IQ of the children. Is this accurate? To what extent does the father’s IQ determine the child’s IQ? Does it vary for boy/girl children? Note: For this example I am only talking about the genetic component of…

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Spearman’s extended hypothesis

Dahlke, J. A., & Sackett, P. R. (2017). The Relationship Between Cognitive-ability Saturation and Subgroup Mean Differences Across Predictors of Job Performance. Journal of Applied Psychology. Abstract The authors quantify the conventional wisdom that predictors’ correlations with cognitive ability are positively related to subgroup mean differences. Using meta-analytic and large-N data from diverse predictors, they…

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Evolution and imperfect mediators

Skoyles, J. R. (1999). Human evolution expanded brains to increase expertise capacity, not IQ. Psycoloquy, 10(002). Chicago Skoyles is arguing a rather implausible claim: Why do modern humans have larger brains than earlier people such as Homo erectus? As large brains cause problems in childbirth, infancy and locomotion, the advantage they offer must be substantial….

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Stats dump October 2017

Anatoly Karlin – The State of the Altsphere (October 2017) He writes: Otherwise, the most popular HBD/IQ blogger, with around 100,000 monthly visits, is… Emil Kirkegaard. This is especially remarkable since his writing tends to the highly technical and he doesn’t have even open comments. I did turn on the comments now, but yeah, kept…

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