Using and Understanding Power in Psychological Research: A Survey Study

Statistical power is key to planning studies if understood and used correctly. Power the probability of obtaining a statistically significant p-value, given set alpha, sample size, population effect size. The literature suggests that psychology are underpowered due small sizes, researchers do not hold accurate intuitions about sensible sizes associated levels power. In this study, we surveyed 214 psychological researchers, asked them their experiences using priori analysis, size estimation methods, post hoc power, understanding what term “power” actually means. analysis use was high, although participants reported difficulties with complex research designs, estimation. Participants also typically could accurately define If expected compute analyses plan research, clearer educational material guidelines should be made available.