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The validity of written job knowledge tests as predictors of job performance and training success was examined. Based on a sample of 363,528 persons and 502 coefficients, meta‐analyses were performed to investigate the extent of validity generalization and the effects of two hypothesized moderator variables: content similarity and job complexity. Corrected mean validities were 0.45 for studies predicting job performance and 0.47 for studies of training success. Support was found for both moderators since validities were higher for high complexity jobs and when job‐test content similarity was high. The implications of this study for personnel selection and research in the area of work performance are discussed.
Dye et al. (Thu,) studied this question.
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