The First Principal Component of Multifaceted Variables: It's More Than a G Thing

Duncan J. R. Jackson, Dan J. Putka and Kevin R. H. Teoh

Industrial and Organizational Psychology, 2015, vol. 8, issue 3, 446-452

Abstract: Ree, Carretta, and Teachout (2015) raise the need for further investigation into dominant general factors (DGFs) and their prevalence in measures used for the purposes of employee selection, development, and performance measurement. They imply that a method of choice for estimating the contribution of DGFs is principal components analysis (PCA), and they interpret the variance accounted for by the first component of the PCA solution as indicative of the contribution of a general factor. In this response, we illustrate the hazard of equating the first component of a PCA with a general factor, and we illustrate how this becomes particularly problematic when applying PCA to multifaceted variables. Rather than simply critique this use of PCA, we offer an alternative approach that helps to address and illustrate the problem that we raise.

Date: 2015
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