Use of the Survey of Personal Beliefs Scale: Further validation of a measure of irrational beliefs with psychiatric inpatients

Development of valid instruments for measuring underlying irrational beliefs is necessary for ongoing research of Rational-Emotive Therapy (RET). This study was designed to further evaluate the validity of one such measure, the Survey of Personal Beliefs (SPB). Adult psychiatric inpatients completed the SPB and measures of depression, hopelessness, and anxiety, as well as a conceptually similar measure of irrational thinking, the Belief Scale. It was predicted that if construct validity exists for the SPB then a significant correlation would exist between irrational beliefs as measured by the SPB and depression, hopelessness, and anxiety. It was also predicted that if the scale has construct validity, then patients being treated with RET would demonstrate a greater reduction in irrational thinking based on SPB scores than would inpatients receiving treatment not based on RET. To evaluate for discriminate validity, it was predicted that the SPB would correlate more highly with a conceptually similar measure of irrational thinking than with measures of depression, hopelessness, and anxiety. The findings of this study offer support for the validity of the SPB. Additional and unexpected findings as well as recommendations are discussed.Dr. Nottingham is an Associate Fellow and Approved Supervisor of the Institute for Rational-Emotive Therapy. He is in independent practice with Germantown Psychological Associates, P.C. and is Director of Psychology and Clinical Director of Adult Mental Health Services at Parkwood Hospital, Olive Branch, MS.I would like to thank Ivey Bright, Brad Barris, and Dee Conrad for their assistance in data collection. Additionally, without the assistance and support of the Parkwood Hospital administration and staff, this research could not have been completed.