Affiliation:
1. University of Southern California
2. University of Illinois
Abstract
The present paper is concerned with measuring the size of an effect for fixed effects factorial analysis of variance (ANOVA) experimental designs. A brief review of the literature is provided, emphasizing the need to use such a measure in actual research. Measuring strength of effect is discussed in correlational terms, taking advantage of the linear model formulation for fixed effects ANOVA. It is concluded that a squared partial correlation between factor and response (partialing out effects of other factors) is usually to be preferred to the corresponding un-partialled measure (ω2) advocated by Hays (1963) and others. Examples are provided to illustrate the practical implications of this distinction.
Subject
Applied Mathematics,Applied Psychology,Developmental and Educational Psychology,Education
Cited by
70 articles.
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