# COMMONALITY ANALYSIS: A METHOD FOR DECOMPOSING EXPLAINED VARIANCE IN MULTIPLE REGRESSION ANALYSES

COMMONALITY ANALYSIS: A METHOD FOR DECOMPOSING EXPLAINED VARIANCE IN MULTIPLE REGRESSION ANALYSES Commonality analysis is a procedure for decomposing R2 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. Commonality analysis thus sheds additional light on the magnitude of an obtained multivariate relationship by identifying the relative importance of all independent variables, findings which can be of theoretical and practical significance. In this paper we offer a brief explication of commonality analysis; a step‐by‐step discussion of how communication researchers may perform commonality analyses using output from computer‐assisted statistical analysis programs like SPSS; and we provide an extended example illustrating a commonality analysis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Human Communication Research Oxford University Press

# COMMONALITY ANALYSIS: A METHOD FOR DECOMPOSING EXPLAINED VARIANCE IN MULTIPLE REGRESSION ANALYSES

, Volume 5 (4) – Jun 1, 1979
11 pages

/lp/oxford-university-press/commonality-analysis-a-method-for-decomposing-explained-variance-in-6TfVVd0i58
Publisher
Oxford University Press
Copyright © 1979 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0360-3989
eISSN
1468-2958
DOI
10.1111/j.1468-2958.1979.tb00649.x
Publisher site
See Article on Publisher Site

### Abstract

Commonality analysis is a procedure for decomposing R2 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. Commonality analysis thus sheds additional light on the magnitude of an obtained multivariate relationship by identifying the relative importance of all independent variables, findings which can be of theoretical and practical significance. In this paper we offer a brief explication of commonality analysis; a step‐by‐step discussion of how communication researchers may perform commonality analyses using output from computer‐assisted statistical analysis programs like SPSS; and we provide an extended example illustrating a commonality analysis.

### Journal

Human Communication ResearchOxford University Press

Published: Jun 1, 1979

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