https://doi.org/10.1177/0886260517719904 Journal of Interpersonal Violence 1–27 © The Author(s) 2017 Reprints and permissions: sagepub.com/journalsPermissions.nav DOI: 10.1177/0886260517719904 journals.sagepub.com/home/jiv Article The Impact of Perpetrator Characteristics on the Completion of a Partner Abuse Intervention Program Jami L. Mach, 1 Arthur L. Cantos, 2 Emily N. Weber, 1 and David S. Kosson 1 Abstract This study examined how type of perpetrator (family only [FO] vs. generally violent [GV]), readiness to change, and stake in conformity function separately and together in predicting completion of a partner abuse intervention program (PAIP). Data were collected from 192 male perpetrators of intimate partner violence (IPV) who were court mandated to attend a PAIP. Participants were categorized as FO violent or GV based on a combination of their self-report and official records of violence. Stake in conformity has been defined as the degree to which an individual is invested in the values and institutions of a society. A composite stake in conformity score was computed for each participant based on his education level, and marital and employment status. Each participant was also assigned a stage of change score based on his responses on a validated measure of stage of change for domestic violence perpetrators. Analyses indicated that stage of change was not related to program completion or attendance. Type of perpetrator and stake in conformity composite score were significantly 1 Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA 2 Carlos Albizu University, San Juan, Puerto Rico Corresponding Author: Jami Mach, Rosalind Franklin University of Medicine and Science, 3333 Green Bay Rd., North Chicago, IL 60064, USA. Email: jami.mach@my.rfums.org 719904JIV XX X 10.1177/0886260517719904Journal of Interpersonal ViolenceMach et al. research-article 2017