The Reasoning and Rehabilitation approach involves 35 2-hour modules which focus on problem solving, social skills, negotiation skills, emotion management, creative thinking, values enhancement, critical reasoning, and cognitive exercises. Reasoning and Rehabilitation is now a component of Colorado's Specialized Drug Offender Program; the program emphasizes presentence drug screening, progressive and regressive program testing, and primary treatment referrals. The SDOP consists of two, 120-day phases, in which offenders are assigned either to an intensive supervision program or to the cognitive reasoning and rehabilitation group; completion of the program is followed by placement in a general probation program. The evaluation instrument used by the Colorado Judicial Department consists of a 120-item questionnaire which focuses on actual unlawful behavior and recidivism, reduction of drug use and precursors to it, reduction in factors associated with criminal behavior, and improvement of skills and attitudes conducive to a productive, socially acceptable lifestyle. 2 tables