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While diary studies have gained in popularity, the validity of the measures utilized in such studies remains an underresearched issue. This study examines the factor structure of the Utrecht Work Engagement Scale (UWES) on both between-person (trait) and within-person (state) levels. A multilevel confirmatory factor analysis was performed to confirm that the between-level factor structure also operates on the within-level. Data from 271 employees who filled in a state version of the UWES on five consecutive days were used to perform the analysis. Results showed that the UWES can be used to measure both trait and state work engagement. The three-factor multilevel model appeared to best fit the data. Implications for future research on engagement are discussed.
Breevaart et al. (Wed,) studied this question.