Abstract: | Most workers are subject to factors in the work place that are beyond their power to control and that act to restrict their performances. Despite the uncontrollable nature of these ‘“situational constraints,” there is evidence that appraisals of work performance tend lo unfairly blame the worker for the shortfalls in performance that these constraints cause. The magnitude of this tendency may be unclear due to the ways in which constraints have been assessed in previous research. A lab study was conducted to obtain a better estimate of the magnitude of situational constraint “bias” using a relativistic rating method that factors out the influence of constraints from performance appraisals. The results indicated that this bias is considerably stronger than previous reports had indicated and may be the dominant source of unfairness in performance appraisals. |