A further study of response, set and the Eysenck Personality Inventory (EPI)

The aims of the investigation were to draw attention to systematic scale score discrepancies between Forms A and B of the Eysenck Personality Inventory (EPI), to suggest that these discrepancies might be mediated by acquiesence response set (ARS), and to provide reliability estimates for ARS and lie scale scores. Evidence relevant to all three intentions was obtained from a student group and a group of psychiatric patients. The predicted discrepancies between scale scores were obtained. The ARS measure derived from the E scale was found to be reliable, and ARS measures from both the E and L scales were found to obtain significantly different values across forms. Practical suggestions were made with regard to the utilization of an individual form of the EPI.