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. 2018 Mar 19;12:103. doi: 10.3389/fnhum.2018.00103

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Copyright © 2018 Dowding and Haufe.

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 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 probability of rejecting the null hypothesis H₀ : d = 0 as a function of the true mean difference d of Gaussian-distributed simulated data from S = 20 subjects. (Left) Data following a random-effects model and exhibiting a perfect negative correlation between the difference of the two group means and the standard deviation associated with this difference. (Right) Perfect positive correlation.