An evaluation assessed the impact of the 40- and 15-hour driver alcohol education (DAE) program models on attitudes, beliefs, and behaviors of driving while intoxicated (DWI) first offenders in Massachusetts. The 40-hour program evaluation studied 306 clients from 31 DAE programs; the 15-hour study group consisted of 207 clients in 23 DAE programs. The survey instrument measured attitudinal, affective, and behavioral variables and included mood and personality measures, degree of alcohol involvement, and quantity/frequency of drinking behavior. It included scales constructed to measure the programs' effect on clients' attitudes toward and beliefs about drinking, self-help groups, and drunk driving. Results indicated that more positive changes in attitudes and beliefs about drinking and driving occurred among clients in the 40-hour program. The 40-hour clients were more likely to believe in the harmful consequences of drinking and driving; were more likely to believe that they would be in an accident, drive recklessly, and be stopped by the police if they drank five drinks in 2 hours; possessed more favorable attitudes toward Alcoholics Anonymous and Mothers Against Drunk Driving; and showed more significant changes in negative attitudes and beliefs in regard to drinking and driving between intake and program completion. (Twelve references, 10 tables, and mean and t-test scores are appended.) (YLB)