Ehud Lamm
Tel Aviv University
A prevalent narrative locates the discovery of the statistical phenomenon of regression to the mean in the work of Francis Galton. It is claimed that after 1885, Galton came to explain the fact that offspring deviated less from the mean value of the population than their parents did as a population-level statistical phenomenon and not as the result of the processes of inheritance. Arguing against this claim, we show that Galton did not explain regression towards mediocrity statistically, and did not give up on his ideas regarding an inheritance process that caused offspring to revert to the mean. While the common narrative focuses almost exclusively on Galton’s statistics, our arguments emphasize the anthropological and biological questions that Galton addressed. Galton used regression towards mediocrity to support the claim that some biological types were more stable than others and hence were resistant to evolutionary change. This view had implications concerning both natural selection and eugenics. The statistical explanation attributed to Galton appeared later, during the biometrician-mutationist debate in the early 1900s. It was in the context of this debate and specifically by the biometricians, that the development of the statistical explanation was originally attributed to Galton.
Keywords Francis Galton  Regression to the mean  Inheritance and statistics  Evolutionary saltationism  Heredity  Normality  Eugenics  Evolution and Causation
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DOI 10.1016/j.shpsa.2020.12.008
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References found in this work BETA

Autonomous-Statistical Explanations and Natural Selection: Figure 1.André Ariew, Collin Rice & Yasha Rohwer - 2015 - British Journal for the Philosophy of Science 66 (3):635-658.
Galton, Reversion and the Quincunx: The Rise of Statistical Explanation.André Ariew, Yasha Rohwer & Collin Rice - 2017 - Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences 66:63-72.
Physics in the Galtonian Sciences of Heredity.Gregory Radick - 2011 - Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences 42 (2):129-138.
Regression Explanation and Statistical Autonomy.Joeri Witteveen - 2019 - Biology and Philosophy 34 (5):1-20.

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