title: Circumplex structure and personality disorder correlates of the Interpersonal Problems model (IIP-C): construct validity and clinical implications.
abstract: This study assessed the construct validity of the circumplex model of the Inventory of Interpersonal Problems (IIP-C) in Norwegian clinical and nonclinical samples. Structure was examined by evaluating the fit of the circumplex model to data obtained by the IIP-C. Observer-rated personality disorder criteria (DSM-IV, Axis II) were used as external correlates. The reliability of the IIP-C scales was acceptable and in the same range as in the original version. A multisample analysis strategy did not support an invariant circumplex model across the 2 groups. However, the estimated structures reflected mostly the same circular pattern of a quasi-circumplex model in the 2 groups. Departures from the ideal model were of negligible practical significance. The validity results examining personality disorder correlates of the IIP-C generally conformed to predictions, providing direct evidence for agreement between self-report and expert judgments of interpersonal problems.
authors.affiliation: Department of Psychology, University of Oslo, Oslo, Norway. j.t.monsen@psykologi.uio.no.
authors.forename: Jon T
authors.initials: JT
authors.lastname: Monsen
authors.forename: Knut A
authors.initials: KA
authors.lastname: Hagtvet
authors.forename: Odd E
authors.initials: OE
authors.lastname: Havik
authors.forename: Dag E
authors.initials: DE
authors.lastname: Eilertsen
mesh_terms: D005104:Expert Testimony; D006801:Humans; D007398:Interpersonal Relations; D008960:Models, Psychological; D015588:Observer Variation; D010554:Personality Disorders / Q000175:diagnosis* / Q000453:epidemiology*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires