Prospective clients must be screened to distinguish the historical user from the truly CDP whose use results in dysfunctions in major life areas. In screening, both qualitative and quantitative analyses are needed, and the intake, orientation, and assessment processes should be used to enhance evaluation. During intake and orientation, the goals and conditions of supervision can be explained. In so doing, probation officers should avoid interrupting the client, show an interest in his or her perspective through careful listening, not threaten the client through inappropriate use of authority or ego threats, and avoid reacting to client resistances inappropriately. Assessment should include a review of the presentence record, a focused interview, review of institutional records, and a physical examination and medical history. While not all clients will require the same treatment or length of treatment, active intervention is essential with CDP's. The first step in intervention is to get the person invested in the treatment process. If probation officers are sensitive to the needs of the CDP, they can serve as helpers, supporters, and counselors to this specialized population. 2 references.