The Impact of Perpetrator Characteristics on the Completion of a Partner Abuse Intervention Program.

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 related to program completion. Perpetrators with higher stake in conformity scores and individuals categorized as FO attended more PAIP sessions and were more likely to complete the program. When both predictors were examined together, only stake in conformity composite score uniquely predicted program attendance and completion. These findings provide additional evidence that subtype of IPV perpetrator has implications for treatment responsiveness and provide preliminary evidence for the value of improved measurement of investment in societal institutions.

Impulsivity as a behavioral measure of withdrawal of orally delivered PCP and nondrug rewards in male and female monkeys.

BACKGROUND: Withdrawal of phencyclidine (PCP), ethanol (ETOH), and other drugs reduces operant responding maintained by food. OBJECTIVES: Experiment 1 examined the effects of withdrawing daily short access (2 h) to drug on impulsivity for saccharin (SACC) using a delay discounting task and comparing male and female rhesus monkeys. Experiment 2 examined the effects of withdrawing a nondrug substance (e.g., food or SACC) on impulsivity for PCP. MATERIALS AND METHODS: In experiment 1, either PCP or ETOH was available daily with water for 2 h under a fixed ratio 16 (FR 16) or FR 8 schedule, respectively. In a second component, SACC was available for 45 min under a delay discounting schedule. Next, water was substituted, and drug access was then restored. In experiment 2, PCP was available under a delay discounting schedule during food satiation or restriction or during concurrent SACC vs water access. RESULTS: In experiment 1, withdrawal of 0.5 mg/ml PCP increased impulsivity for SACC, but not SACC intake, in males and females. During 16% ETOH access, impulsivity for SACC was elevated compared to baseline water access, and it returned to baseline levels during ETOH withdrawal. In experiment 2, food restriction resulted in increased PCP intake in males and females and increases in impulsivity for PCP that were greater in males than in females. SACC withdrawal had no effect on impulsivity for PCP or PCP intake. CONCLUSIONS: Withdrawal of PCP and reduced food access increased impulsivity for SACC or PCP, respectively. Impulsivity is a sensitive indicator of drug dependence.