Selection of the Appropriate Number of Factors: A Case of Questionable Dimensions

Abstract

Based on a factor analysis of the SCL-90, Evenson, et al. in 1980 suggested that a 12-factor solution best described their data. In light of previous literature and a close examination of the Evenson, et al. data, it is suggested by the present authors that only five factors should have been interpreted. Selection of the appropriate number of factors should be based on multiple indicators prior to labeling and interpretation.