| Abstract: | Researchers of appraisal rating accuracy have defined ratee true scores as the mean ratings given by experts provided with enhanced opportunities to observe performance. The external validity of accuracy research depends on the relevance of these expert estimates to true performance. In our study, we provided expert raters with enhanced opportunities to view videotapes of five ratees under conditions of high true dimension intercorrelation or low true intercorrelation. The accuracy of expert ratings was compared with the accuracy of nonexpert ratings of the same tapes viewed under more typical rating conditions. Subjects' ratings were compared with ratee true scores defined in terms of objective worker output. Results indicated that experts were more accurate than nonexperts, regardless of the true dimension intercorrelations. Accuracy indices computed by using objective true scores were highly correlated with indices computed by using the mean expert ratings as true score estimates. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
