In Bayesian statistics, the probability of direction (pd) is a measure of effect existence representing the certainty with which an effect is positive or negative.[1] This index is numerically similar to the frequentist p-value.[2][3]
^Makowski, Dominique; Ben-Shachar, Mattan; Lüdecke, Daniel (13 August 2019). "bayestestR: Describing Effects and their Uncertainty, Existence and Significance within the Bayesian Framework". Journal of Open Source Software. 4 (40): 1541. Bibcode:2019JOSS....4.1541M. doi:10.21105/joss.01541. S2CID 201882316.
^Makowski, Dominique; Ben-Shachar, Mattan S.; Chen, S. H. Annabel; Lüdecke, Daniel (10 December 2019). "Indices of Effect Existence and Significance in the Bayesian Framework". Frontiers in Psychology. 10: 2767. doi:10.3389/fpsyg.2019.02767. PMC 6914840. PMID 31920819.
^Heiss, Andrew. "Bayesian statistics resources". Georgia State University - Bayesian statistics course. Retrieved 7 December 2021.
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