Journal
GENETIC EPIDEMIOLOGY
Volume 46, Issue 7, Pages 390-394Publisher
WILEY
DOI: 10.1002/gepi.22464
Keywords
achieved power; exploratory data analysis; observed power; postexperiment power; retrospective power
Funding
- National Institutes of Health [R01HL093093, R01HL1333040, TL1TR001858]
Ask authors/readers for more resources
This article discusses why post hoc power calculations should not be used and their misleading nature, and presents a simulation study as an illustration.
Post hoc power estimates are often requested by reviewers and/or performed by researchers after a study has been conducted. The purpose of this commentary is to provide a heuristic explanation of why post hoc power should not be used. To illustrate our point, we provide a detailed simulation study of two essentially identical research experiments hypothetically conducted in parallel at two separate universities. The simulation demonstrates that post hoc power calculations are misleading and simply not informative for data interpretation. As such, we encourage authors and peer-reviewers to avoid using or requesting post hoc power calculations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available