تقدير القوة الإحصائية للدراسات النفسية في المجلات العربية (2000-2012)‎

Abstract AR

The study aimed to estimate the statistical power in published psychological studies in Arabian Journals form 2000 to 2012.

The research sample consist of 49 studies included 233 t test (53.3%), 176 Pearson correlation (40.3%), and 28 multiple Regression (6.4%).

Effect Size and statistical power were estimated by G–Power program.

The overall median power for all tests was 0.28 for small effect size, 0.98 for medium effect, and 0.99 for large effect size.

In general more attention should be placed for both a prior and post hoc power because of its importance of Research design's quality and result generalization.