Abstract
Significance: Conscientiousness (C) is the most potent noncognitive predictor of occupational performance. However, questions remain about how C relates to a plethora of occupational variables, what its defining characteristics and functions are in occupational settings, and whether its performance relation differs across occupations. To answer these questions, we quantitatively review 92 meta-analyses reporting relations to 175 occupational variables. Across variables, results reveal a substantial mean effect of ρ ¯ M = 20 . We then use results to synthesize 10 themes that characterize C in occupational settings. Finally, we discover that performance effects of C are weaker in high-complexity versus low- to moderate-complexity occupations. Thus, for optimal occupational performance, we encourage decision makers to match C’s goal-directed motivation and behavioral restraint to more predictable environments.

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