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Power Rules: Practical Advice for Computing Power (and Automating with Pilot Data)

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  • Rainey, Carlisle

Abstract

Recent work emphasizes the importance of statistical power in the social sciences and shows that power tends to be very low. In this paper, I offer simple rules to compute power for balanced, between-subjects designs, including new advice for using pilot data to automate the power analysis. In many cases, these rules are sufficient for a complete, compact, and compelling power analysis for treatment effects and interactions. Most importantly, these rules help researchers develop a sharp intuition about statistical power, lower the barrier to entry for researchers new to thinking carefully about statistical power, and help researchers design powerful, informative experiments.

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  • Rainey, Carlisle, 2025. "Power Rules: Practical Advice for Computing Power (and Automating with Pilot Data)," OSF Preprints 5am9q_v2, Center for Open Science.
    • Handle: RePEc:osf:osfxxx:5am9q_v2
    DOI: 10.31219/osf.io/5am9q_v2
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