The paper presents findings of a study evaluating the impact of performance appraisal training on rating accuracy and perceived rating ability. 41 supervisors from a telecommunications firm took part in the training evaluated video vignettes and completed a questionnaire measuring self-efficacy beliefs about rating, goal intentions, and feelings about future rating behaviour. Supervisors in a control group (n = 12) also rated the video and completed the questionnaire. Trained supervisors showed increased accuracy on video ratings of work behaviour over the course of the training and an increase in self-efficacy measures. Control group supervisors by comparison decreased their accuracy of rating over the same time period while self-efficacy ratings remained constant. Impact of training on satisfaction and goals of participants is also presented.