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Revista Colombiana de Psiquiatría
Print version ISSN 0034-7450
Abstract
DE FRANCISCO CARVALHO, Lucas et al. Inventory of Interpersonal Problems-Personality Disorders: adaptation to Brazil and test of a bifactor model. rev.colomb.psiquiatr. [online]. 2023, vol.52, n.1, pp.29-37. Epub May 23, 2023. ISSN 0034-7450. https://doi.org/10.10167j.rcp.2021.03.003.
Objective:
The Inventory of Interpersonal Problems-Personality Disorders (IIP-PD-47) has a controversial factor structure, as some studies have provided support for 5 correlated factors, and others have suggested the existence of a general second-order dimension. One approach of data modelling that reconciles multidimensionality and the existence of a general factor is the bifactor analysis. We used unrestricted exploratory-confirmatory bifactor modelling to validate the Brazilian version of the IIP-PD-47.
Methods:
The sample consisted of 1,091 subjects aged 18-64 years who answered the IIP-PD-47 and a collateral measure of pathological traits, the Dimensional Clinical Personality Inventory 2 (IDCP-2).
Results:
After testing many candidate models, our data were best represented by a bifactor model with one general factor and five specific uncorrelated factors. Nevertheless, a closer inspection of the discriminant validity of each IIP-PD-47 factor revealed strong support for the general factor and a factor capturing aggressive behaviours, but less support for the additional four specific factors.
Conclusions:
The theoretical and practical implications of these findings are discussed, and some recommendations are offered about the need for controlling response styles when assessing PD traits via self-report inventories. Our findings indicate that the Brazilian version of IIP-PD has promising psychometric properties.
Keywords : Screening; Pathological traits; Self-report; Personality assessment; Psychometrics.