The systematic distortion hypothesis, halo, and accuracy: An individual-level analysis.

In several social perception studies investigators have concluded that raters' semantic conceptual similarity schemata serve to guide and constrain dimensional covariance in the rating judgment process. This effect has been hypothesized to be most likely when ratings are memory based and raters lack relevant job or ratee information. Recent research that has explored the effects of conceptual similarity schemata on performance ratings and halo error has provided some limited support for this systematic distortion hypothesis (SDH). However, these studies are limited because researchers have examined this phenomena using group-level analyses, whereas the theory references individual-level judgment processes. The present study investigated the phenomena at the individual level. The effects of varying levels of rater job knowledge (high, medium, and low) and familiarity with ratees (high and low) were examined for conceptual similarity-rating and rating-true-score covariation relations, for measures of halo, and for rating accuracy components. Results provided support for the SDH, but indicated a boundary condition for its operation and revealed some surprising findings for individual-level rater halo.