"Manipulating Subjective Expectancy Through Feedback: A Laboratory Study of the Expectancy-Performance Relationship": Correction to Janz

Abstract

Reports an error in the original article by Janz (Journal of Applied Psychology. Vol 67(4) Aug 1982, 480-485). On page 481 and 484, the numbers of subjects in some places were reported incorrectly. The corrections are provided. (The following abstract of this article originally appeared in record 1982-29612-001 .) Investigated the form of the expectancy-performance relationship in a laboratory study of the performance of 132 undergraduates on a simple clerical task. As feedback after each of 8 trials, Ss were told that their performance was better, worse, or borderline. Ss recorded their subjective expectancies before each trial. Over all Ss, feedback condition had no impact on performance; but when 39 Ss whose reported expectancy did not match their assigned feedback were eliminated, a strong expectancy-performance relationship emerged. Ss having intermediate expectancy outperformed those whose expectancy was low or high. Examination of the nonbelievers supported the mediating role of cognitive variables in deciding how hard to work at this task. (PsycInfo Database Record (c) 2025 APA, all rights reserved)