A VALIDITY AND RELIABILITY STUDY OF THE PROCESS-REACTIVE SELF-REPORT SCALE

EXAMINED THE RELIABILITY, INTERNAL CONSISTENCY, AND CONCURRENT VALIDITY OF ULLMANN AND GIOVANNONI'S PROCESS-REACTIVE SELF-REPORT SCALE. THE STABILITY COEFFICIENT WAS COMPARABLE TO THE PREVIOUSLY REPORTED SPLIT-HALF RELIABILITY OF THE SELF-REPORT AND THE PRESENTLY FOUND BETWEEN-RATER RELIABILITY OF THE PHILLIPS PREMORBID ADJUSTMENT SCALE. THE INTERNAL CONSISTENCY COEFFICIENTS OF EACH ITEM WERE COMPARABLE TO THOSE PREVIOUSLY REPORTED IN THE DEVELOPMENT OF THE SCALE. THE CONCURRENT VALIDITY COEFFICIENT WAS INSIGNIFICANT WHEN COMPARING THE SELF-REPORT TO PREMORBID ADJUSTMENT SCALE. THIS MAY BE DUE TO THE SAMPLE BEING CHRONIC AND THE PATIENT ATTEMPTING TO PRESENT AN IMAGE OF BEING "ILL" RATHER THAN IN REPORTING PAST SOCIAL HISTORY. RESULTS CAUTIONED AGAINST USING BOTH INSTRUMENTS INTERCHANGEABLY UNTIL FURTHER WORK CAN EXAMINE THE POSSIBLE DISTORTION IN THE SELF-REPORT OF SPECIFIC PATIENT GROUPS.