[Development and validation of the Reality-Monitoring Error Experience Questionnaire].

This study developed a valid and reliable questionnaire measuring individual differences in reality-monitoring error experiences in everyday life. A 50-item preliminary questionnaire was constructed on the basis of the findings from a pilot diary study. In study 1, we administered the questionnaire to 316 undergraduates, along with a dissociative experience scale to examine criterion-referenced validity. Using factor analysis, we obtained the 32-item Reality-Monitoring Error Experience Questionnaire (RMEEQ). A significant positive correlation was found between scores on the RMEEQ and the dissociative experience scale, thereby which indicates the RMEEQ's criterion-referenced validity. In Study 2, we examined the test-retest reliability of the RMEEQ by administering it to 66 undergraduates on two occasions separated by three weeks. We found a significant test-retest correlation. Taken together, these results show that the RMEEQ is a valid and reliable measure of reality-monitoring error experiences in everyday life.