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ERIC Number: ED367694
Record Type: RIE
Publication Date: 1994-Apr
Pages: 15
Abstractor: N/A
Reference Count: N/A
Commonality Analysis for the Regression Case.
Murthy, Kavita
Commonality analysis is a procedure for decomposing the coefficient of determination (R superscript 2) in multiple regression analyses into the percent of variance in the dependent variable associated with each independent variable uniquely, and the proportion of explained variance associated with the common effects of predictors in various combinations. Commonality analysis is an attempt to understand the relative predictive power of regressor variables, both individually and in combination. Despite their utility, these methods have not been used with great frequency, perhaps because these methods are not fully automated in commonly used statistical packages. This paper explores the applications of commonality analyses by reanalyzing data from a study of the relationships among anger and stress in predicting depression among 247 undergraduate students. This data set is employed as a heuristic to make the discussion more accessible. In addition, a Statistical Analysis System (SAS) computer program procedure for obtaining all possible R superscript 2 values is discussed as an efficient method of implementing the required analyses. Two tables and one chart are appended. (Contains 13 references.) (Author/SLD)
Publication Type: Information Analyses; Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Commonality Analysis; Statistical Analysis System; Variance (Statistical)
Note: Paper presented at the Annual Meeting of the American Educational Research Association (New Orleans, LA, April 6, 1994).