G * Power 3 : A flexible statistical power analysis program for the social , behavioral , and biomedical sciences

  • Fual F
  • Erdfelder E
  • Lang A
 et al. 
  • 38

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Abstract

G*Power (Erdfelder, Faul, & Buchner, 1996) was designed as a general stand-alone power analysis program for statistical tests commonly used in social and behavioral research. G*Power 3 is a major extension of, and improvement over, the previous versions. It runs on widely used computer platforms (i.e., Windows XP, Windows Vista, and Mac OS X 10.4) and covers many different statistical tests of the t, F, and O2 test families. In addition, it includes power analyses for ztests and some exact tests. G*Power 3 provides improved effect size calculators and graphic options, supports both distribution-based and design-based input modes, and offers all types of power analyses in which users might be interested. Like its predecessors, G*Power 3 is free.

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Authors

  • F Fual

  • E Erdfelder

  • A Lang

  • A Buchner

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