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Determining the power of multiple regression analyses both with and without repeated measures
1Department of Psychology, Georgia State University, Atlanta 30303, USA. bakeman@gsu.edu
Behavior Research Methods, Instruments, & Computers : a Journal of the Psychonomic Society, Inc
|September 25, 1999
Summary
BW-Power is a Windows program that simplifies power analysis for various research designs. It helps researchers determine the necessary sample size for studies with between-subjects, within-subjects, or mixed factors.
Area of Science:
- Psychology
- Statistics
- Research Methodology
Background:
- Power analysis is crucial for determining adequate sample sizes in research.
- Existing tools may not efficiently handle complex factorial designs.
- Researchers need accessible software for accurate statistical planning.
Purpose of the Study:
- To introduce BW-Power, a software tool for conducting power analyses.
- To demonstrate BW-Power's capability in handling diverse research designs.
- To facilitate efficient sample size determination for researchers.
Main Methods:
- Description of BW-Power, a computer program for Windows 95.
- Focus on its ability to perform power analyses for between-subjects, within-subjects, and mixed designs.
- Illustration of user interface features, including iterative sample size adjustment and automatic power recalculation.
Main Results:
- BW-Power effectively accommodates designs with only between-subjects factors.
- The software successfully performs power analyses for designs with only repeated measures.
- BW-Power handles mixed between- and within-subjects designs efficiently.
Conclusions:
- BW-Power provides a user-friendly solution for power analysis in complex research designs.
- The program's features streamline the process of determining optimal sample sizes.
- BW-Power enhances research planning by simplifying statistical power calculations.