Abstract
Signal detection theory was used to assess two recent studies of industrial performance. Gordon (1970) found raters to be significantly more accurate in identifying correct as compared to incorrect performance in a simulated sales task. The detection model suggested that this differential accuracy of raters could be manipulated in a predictable way by varying (a) the rater's expectancy concerning the likelihood of correct behavior, and (b) his payoff matrix. Harris (1968) concluded that the accuracy of inspectors in detecting defective items changed with the quality of the product. A signal detection analysis of Harris' data did not support this conclusion but did suggest deficiencies in one of his indices of inspection accuracy.
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