THE STRUCTURE, VALIDITY AND CLINICAL RELEVANCE OF THE INVENTORY OF INTERPERSONAL PROBLEMS

This paper presents preliminary data on the psychometric and clinical properties of the Inventory of Interpersonal Problems (IIP: Horowitz, Rosenberg, Baer, Ureno & Villasenor, 1988) obtained from a UK sample o f clients presenting with depression/anxiety for individual psychother apy as part of two concurrent outcome studies: the Second Sheffield Ps ychotherapy Project (SPP2) and the Medical Research Council/NHS Collab orative Psychotherapy Project (CPP). The factor structure of the IIP i s reported on a sample of 250 clients and eight factor-analytically de rived scales are presented. Data on the reliability of the IIP togethe r with its relationship to the Symptom Checklist-90R (SCL-90R: Derogat is, 1983) are investigated in a subsample of 143 clients. In addition, data are presented on the clinical relevance of the IIP using case ma terial. The structure of the IIP was further analysed using ipsatized scores. Four bipolar factors were extracted and these findings are dis cussed with reference to four primary sets of social competencies.