Job knowledge, ratee familiarity, conceptual similarity and halo error: An exploration.

The results of numerous social perception studies have led researchers to conclude that raters' implicit cognitive schemata regarding trait and behavior covariance may play a crucial role in the rating judgment process. W. H. Cooper (see PA, Vol 66:9176 and 9262) proposed one such cognitive schema, semantic conceptual similarity, as a key source of halo error in job performance ratings but was unable to reproduce the results of previous social perception research. The present study, with 186 undergraduates, employed baseball players as target ratees to examine the effects of job and ratee knowledge on the relations of raters' conceptual similarity schemata with rating and true score covariance. The results are consistent with the systematic distortion hypothesis presented by R. A. Shweder (see record 1976-07240-001). The association between conceptual similarity and rating covariance was significantly greater when Ss lacked sufficient job and/or ratee knowledge. Moreover, the degree of halo was also significantly greater when Ss lacked relevant job and ratee knowledge. The advantages of using objective measures of actual performance as true score estimates in the study of rater cognitive processes are discussed. (30 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)