| Abstract: | This study examined 2 possible ways of increasing the predictive validity of personality measures: using observer (i.e., supervisor and coworker) ratings and work‐specific self‐ratings of Big Five personality factors. Results indicated that among general self‐ratings of Big Five personality dimensions, Conscientiousness was the best predictor of in‐role performance, and Agreeableness and Emotional Stability were the best predictors of organizational citizenship behavior (OCB). Observer ratings of personality accounted for incremental variance in job performance (in‐role performance and OCB) beyond that accounted for by general self‐ratings. However, contrary to our expectations, work‐specific (i.e., contextual) self‐ratings of personality generally did not account for incremental variance in job performance beyond that accounted for by general self‐ratings. |
