Effects of Comparative Performance Information on the Accuracy of Self-Ratings and Agreement Between Self- and Supervisor Ratings

The manner in which social comparison performance information affects the accuracy of self-ratings and the agreement between self- and supervisor ratings was investigated in a laboratory experiment using 163 undergraduates. Ss proofread a series of articles for 30 min and then made self-ratings of work performance. Half of the subjects received social comparison information prior to making self-ratings. Correlations between self- and supervisor evaluations and between self-evaluations and objective performance indicators were significantly larger when self-raters were presented with the same comparative performance information that was available to supervisors. Implications of the findings for future research on self- and supervisor evaluations are discussed.