Problem In my power simulation of the U-shape experiment, I noticed that the suggested priors (click here) actually do not work very well for Bayes Factor (BF) analysis as they are too flat and hence BF are too conservative. That is because uniform or very flat priors lead to less evidence in favour of the alternative hypothesis.
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This post is based on a short talk that I gave at the MRC CBU on the 29 July 2020 for a session on statistical power. The slides of presentation can be found in my GitHub repository. This repository also includes the data and the scripts that were used to run the simulations and to create the figures.
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Introduction Comparing the four BF methods Evidence for null hypothesis: brms vs. ttestBF() How much more conservative is the bmrs approach? Directed vs. non-directed hypothesis Conclusion Introduction In this post, I’d like to examine how different ways to calcualte Bayes factors (BF) compare with each other for a simple model.
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