Evaluating practice: The dual roles of clinician and evaluator

When single-subject design is the method used to evaluate clinical work, the same person simultaneously conducts counseling and evaluation. The author describes situations in which the roles of clinician and evaluator are compatible as well as circumstances in which difficulties in exercising the demands of both roles occur. The various phases of the treatment/evaluation process are followed, and suggestions are given regarding ways to resolve differences between the clinician's and the evaluator's perspectives.