Method and trait effects in multitrait‐multirater (MTMR) data were examined in a sample of 2,350 managers who participated in a developmental feedback program. Managers rated their own performance and were also rated by two subordinates, two peers, and two bosses. The primary purpose of the study was to determine whether method effects are associated with the level of the rater (boss, peer, subordinate, self) or with each individual rater, or both. Previous research which has tacitly assumed that method effects are associated with the level of the rater has included only one rater from each level; consequently, method effects due to the rater's level may have been confounded with those due to the individual rater. Based on confirmatory factor analysis, the present results revealed that of the five models tested, the best fit was the 10‐factor model which hypothesized 7 method factors (one for each individual rater) and 3 trait factors. These results suggest that method variance in MTMR data is more strongly associated with individual raters than with the rater's level. Implications for research and practice pertaining to multirater feedback programs are discussed.
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