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Self-efficacy has been shown to be related to outcomes from interventions for alcohol and tobacco abuse but relatively little attention has been focused on it in evaluations of treatment for illicit drug abuse. Almost no research has examined offenders involved with drugs. The current study, therefore, adapted the Alcohol Abstinence Self-efficacy Scale of DiClemente, Carbonari, Montgomery, and Hughes and administered it to 250 probationers mandated to 6 months of residential treatment. With some modifications, confirmatory factory models replicated four previously reported dimensions, e.g., Negative Affect, Social/Positive, Physical and Other Concerns, Cravings and Urges. Findings also indicated high construct validity for the Alcohol Abstinence Self-efficacy Scale as adapted here. Studies are needed to examine the use of self-efficacy as a prospective measure of treatment progress and to explore its association with outcomes from corrections-based treatment.

Recent studies comparing self-admitted cocaine use with hair and urine test results have raised concerns about underreporting due to variations across situations and settings. Because of the frequent need for self-report data in conducting treatment evaluations, more information is needed on factors that affect the credibility of this information. The present study examines records of cocaine use collected as part of an evaluation of prison-based treatment (N=396). Specifically, self-reported cocaine use from 6-month postrelease follow-up interviews, completed with treatment graduates and a comparison sample of parolees who were eligible but not sent to treatment, was examined in relation to urine and hair test results. Overall, cocaine use was underreported when compared to hair test results, but underreporting was lower for program graduates than for the untreated comparison group. Furthermore, program graduates originally admitted to prison on a drug-related arrest were the most likely to underreport cocaine use, seemingly due to a heightened concern about potential consequences, such as returning to prison on another drug-related charge. Given that the validity of self-report for high-risk individuals varies greatly and is difficult to predict across studies, future research with criminal justice samples should continue to assess the validity of these measures under specific research conditions and for diverse types of individuals.

Research has shown that substance abuse treatment is associated with reduced criminal activity as well as reduced drug use. An increasingly important aspect of treatment evaluation, however, is understanding more about the therapeutic process involved. Based on a sample of 279 probationers assigned to residential treatment for drug use problems, the purpose of this study is to examine several elements of treatment process and how they influence recidivism. Rearrest rate during a 2-year follow-up study period was 36%, and survival analysis showed it was directly related to poorer during-treatment ratings by probationers of self-esteem, counselor competence, and peer support from others in the treatment program. These were better predictor measures than background and demographic characteristics generally used in other studies, suggesting the role of therapeutic engagement in the recovery process.