Distinguishing personality and biodata items using confirmatory factor analysis of multitrait-multimethod matrices

Hard biodata, soft biodata, and personality items were developed to measure three personal constructs (Dependability, Demeanor, and Ambition). This resulted in nine sets of items forming a three-method (personality, soft biodata, and hard biodata) by three-trait (Dependability, Demeanor, and Ambition) Multitrait-Multimethod (MTMM) matrix. Four models were proposed to represent the nine scales and each was tested on a sample of 477 job applicants and subsequently cross-validated on a sample of 958 job applicants, using confirmatory factor analysis. The model where the personality and soft biodata items represented one factor and the hard biodata items represented another, distinct factor, was both the best fitting and most parsimonious model, thus confirming Asher's (1972) taxonomy.This research was based in part on a doctoral dissertation submitted to Wayne State University. I would like to thank committee members Lois Tetrick (Chair), Alan Bass, Sebastiano Fisicaro, and Thomas Naughton. An earlier version of this paper was presented at the 8th annual conference of the Society for Industrial and Organizational Psychology (SIOP), San Francisco, CA: April, 1993.