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RESEARCH PRODUCT

Factor Structure and Longitudinal Factorial Validity of the Core Self-Evaluation Scale

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Abstract. The personality high-order concept of core self-evaluations (CSE), which refers to a basic evaluation of one’s worth, capability, and effectiveness, has attracted a lot of research interest. Yet little is known about the construct validity of the core self-evaluation scale (CSES) while information on its longitudinal factorial validity is wholly lacking. This study investigated the factor structure of the CSES using both confirmatory and exploratory factor analysis implemented in Mplus program. In addition, the factor loading invariance over time was investigated using exploratory structural equation modeling. Longitudinal data with three follow-ups over 2 years, gathered among university employees (n = 926 (T3)–2,137 (T1)), were used. The results showed that a two-factor solution comprising the sub-dimensions Internal and External self-evaluations fitted to the data better than the alternative factor models. The two-factor solution was also invariant across the three measurements. It is concluded that the CSES could be used as a two-dimensional instead of a one-dimensional scale. Splitting the scale into the two sub-dimensions of Internal and External self-evaluations revealed that the concept has a finer-grained structure than hitherto thought.