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G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences
Franz Faul1, Edgar Erdfelder, Albert-Georg Lang
1Institut für Psychologie, Christian-Albrechts-Universität Kiel, Kiel, Germany. ffaul@psychologie.uni-kiel.de
Behavior Research Methods
|August 19, 2007
Summary
G*Power 3 is a free, enhanced statistical power analysis program for social and behavioral research. It supports numerous statistical tests and offers improved effect size calculators and graphic options for researchers.
Area of Science:
- Social and Behavioral Sciences
- Statistical Software Development
Background:
- G*Power was initially developed as a standalone program for statistical power analysis.
- Previous versions served the social and behavioral research communities effectively.
Purpose of the Study:
- To introduce G*Power 3, a significant extension and improvement of the original G*Power software.
- To provide researchers with a comprehensive and accessible tool for power analyses across various statistical tests.
Main Methods:
- G*Power 3 is a software program designed for statistical power analysis.
- It covers a wide range of statistical tests, including t, F, chi2, z, and exact tests.
- The software includes enhanced effect size calculators and graphic options.
Main Results:
- G*Power 3 offers broad platform compatibility (Windows and Mac OS X).
- It supports both distribution-based and design-based input modes for power analyses.
- The program provides comprehensive power analysis capabilities for diverse research needs.
Conclusions:
- G*Power 3 represents a major advancement in statistical power analysis software.
- It remains a free and valuable resource for researchers in social and behavioral sciences.
- The enhanced features and broad test coverage improve its utility for study design and analysis.
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