Payam Piray @payampiray.bsky.social · 17/11/2025Happy to share my new paper published in @nathumbehav.nature.com: A critical look at statistical power in computational modeling studies, particularly those based on model selection. www.nature.com/articles/s41... 25015
Payam Piray @payampiray.bsky.social · 17/11/2025I argue that we need to account for the size of the model space when determining sample size, as larger model spaces reduce power. I also show that the commonly used “fixed effects” model selection approach is statistically unreliable. An analysis of the literature suggests shortcomings in both 160
Harrison Ritz @hritz.bsky.social · 17/11/2025Really helpful work! Did you use XP instead of protected XP (+ BOR)? Would those change the family-size effect? Can you give any guidance for (P)XP critical values? eg as a function of sample and/or family size? Even if you had to make assumptions about the dirchelet parameters, could be helpful! 120
