Background: Recently, evaluation studies of batterer intervention programs (BIPs) have produced disturbing findings. Although the initial evaluation literature was generally positive, more rigorous subsequent studies (e.g., pretest-posttest control group designs) and two recent meta-analyses have indicated that BIPs are having a small effect or no effect on batterer recidivism. Unfortunately, at the same time that rigorous evaluation research is documenting problems with BIP outcomes, many states are legislating standards to formalize BIP structure and length that serve to institutionalize the “one size fits all” treatment model discussed in the literature [more than 30 states have legislation governing BIP program standards, and several more have legislation pending. The impact of this trend on culturally specialized programming is not entirely clear, but the “one size fits all” nature of the BIP mandated by the legislation would appear to preclude specialized programming for minority batterers. Currently, there is no empirical information available regarding the effectiveness of the BIP being instituted through state standards for ethnic minorities. However, in all of the evaluation studies discussed previously, none evaluated the effect of different types of intervention efforts on batterers of different racial or ethnic backgrounds. Objective: The purpose of the present study was to: (a) evaluate a 26-week BIP by investigating changes in psychological variables related to abuse (i.e., truthfulness, violence, lethality, control, alcohol use, drug use, and stress coping abilities) between pre-treatment and post-treatment assessments in a large sample of men involuntarily in treatment; and, (b) to investigate the differential effectiveness of this same BIP for African-American and Caucasian batterers. Method: The study employed a secondary analysis of 850 treatment completers. Program participants were grouped by race (African-American & Caucasian) and compared using a series of independent t-tests and chi-square tests of significance. Independent t-tests were also used to determine differences between African-American and Caucasian participants on issues of socially desirable responding (Balanced Inventory of Desirable Responding), assertiveness (Spouse-Specific Assertiveness Scale), passive/aggressive behavior (Spouse-Specific Assertiveness Scale), control (Control of Partner Scale), and propensity for abusiveness (Propensity for Abusiveness Scale) both prior to program entry and upon BIP completion. A series of repeated measures or paired t-tests, with an adjusted alpha level to control for Type I error rates, were conducted to examine the extent to which participants' scale scores changed significantly between the pre-treatment and post-treatment assessments as a result of the intervention. Finally, to further investigate the differential impact of the program for African-American and Caucasian batterers involuntarily placed in treatment, this study employed logistic regression to predict racial group membership based upon change scores on the psychological scales. Results: The findings of this study suggest that the court-ordered batterers comprising this sample demonstrate significant changes, in the desired direction, on psychological variables related to domestic violence, as a result of participation in a court-mandated treatment program with no significant difference in terms of magnitude of change on these same psychological variables between African-American and Caucasian batterers. Conclusion: Implications of the findings for social workers were explored and discussed.