How to Evaluate Reports of Intimate Partner Violence? Examining Interpartner Agreement in a Forensic Sample of Different-Sex Couples Where Men are Accused of Intimate Partner Violence

Abstract

Research about interpartner agreement on intimate partner violence (IPV) is mainly based on community and clinical samples, with forensic or court-related samples being overlooked. This study assesses interpartner agreement on IPV reports based on the Revised Conflict Tactic Scales, aiming to explore if the proxy method would be reliable in a court-related setting. The study sample comprised 62 different-sex couples identified in the Portuguese judicial system due to an IPV-related crime perpetrated by men. Agreement was assessed based on different indexes: percent agreement and Gwet’s AC1 for occurrence, and Tau-b and intraclass correlations for frequency. Men’s and women’s perpetration were considered. Results showed that interpartner agreement on IPV occurrence (ranging from poor-to-very good) tended to be higher and more consistent among indexes than agreement on IPV frequency (ranging from non-existent to strong). This study highlights the need to collect both partners’ reports in court-related settings.