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. 2021 Oct 20;12:661022. doi: 10.3389/fpsyg.2021.661022

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Copyright © 2021 Donnelly and Kidd.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The prior distribution of the precision parameter for models of individual differences. The left side shows the prior density on the precision parameter, phi. The variance of a beta distribution is a product of its mean and phi. The right side shows the histograms of simulated data assuming varying means and precisions (the latter of which span the range of plausible values encoded by the prior distribution). Columns represent different values of the mean, and rows represent different phis. As can be seen, this prior is consistent with data of varying spreads.