Conceptual similarity as a source of illusory halo in job performance ratings

Abstract

Tested whether a possible source of difficulty in materially reducing illusory halo in job performance ratings is raters' beliefs that rating categories are conceptually similar and hence covary, thereby inflating observed correlation matrices. 11 graduate business administration students evaluated the conceptual similarities among job dimensions within 3 jobs. The previously observed interdimension correlation matrices were successfully predicted by Ss' mean conceptual similarity scores. When the observed correlation matrix obtained by W. C. Borman (see record 1980-26801-001 ) was compared with the normative true score matrix, the conceptual similarity scores were found to be inferior predictors of the observed correlation matrix compared with the superior predictive ability of the normative true score matrix. It is suggested that conceptual similarities among job dimensions represent one potentially recalcitrant source of illusory halo in performance ratings, particularly when ratings are based on encoded observations that have decayed in memory. (24 ref) (PsycInfo Database Record (c) 2025 APA, all rights reserved)