Psychometric evaluation of the Inventory of Interpersonal Problems 32

The Inventory of Interpersonal Problems 32 (IIP-32; Horowitz, Aiden, Wiggins, & Pincus, 2000) is a brief, 32-item, self-report questionnaire used to screen for interpersonal problems. While studies of the IIP-32's psychometric properties have been conducted in other nations, and studies have examined the psychometric properties of the IIP-32's circumplex structure, no studies have examined the factor-analytic structure in the United States since the original standardization sample. The aim of this study was to examine the psychometric properties of the IIP-32 in American college women for the first time and explore its structural validity as a circumplex measure and its concurrent validity with measures of attachment. The current study found that internal consistency estimates and interscale correlations were generally high and confirmed the proposed circumplex structure. In addition, concurrent validity was evidenced by confirming theorized relations between attachment and the IIP-32 subscales. However, IIP-32 subscales were limited with regard to divergent validity.