Psychometric evaluation of the Functional Analytic Psychotherapy Intimacy Scale in obsessive-compulsive and related disorders

Functional Analytic Psychotherapy (FAP) is a contextual behavioral therapy that targets specific ideographic behaviors related to interpersonal functioning and intimacy. There is a scarcity of measures specifically focused on behavioral measurement of intimacy as well as limited studies that examine intimacy in obsessive-compulsive and related disorders (OCRDs). Leonard and colleagues (2014) created the Functional Analytic Psychotherapy Intimacy Scale (FAPIS). The purpose of this study was to investigate the validity of the FAPIS in evaluating those with OCRDs. The FAPIS and other measures of intimacy were administered to 549 nonreferred adults endorsing OCRD symptoms. Several confirmatory factor analyses were conducted to assess the best fitting factor structure, and convergent validity and divergent validity were also assessed. Given the psychometric properties of the FAPIS in this sample, future research may be helpful in assessing if the FAPIS would be beneficial in measuring change related to intimacy when working with people with OCRDs.