This study compares the attitudes of two groups of professionals involved in adolescent drug and alcohol treatment regarding the usefulness of Mediated Learning Experience as a supplement to Multi Systemic Treatment (MST) for substance abuse. Fifteen social workers and 15 school psychologists completed a rating scale to record their opinions of MST, to assess their reactions to several areas of therapy, and to answer questions about parents and teachers as part of the therapy process. The survey found a favorable attitude toward considering this inclusion, as well as no difference between the attitudes of the two groups. Limitations were noted on the size of the groups and the method used to obtain respondents. Respondents voiced a positive attitude regarding the addition of MLE to their treatment plans. The useful role of the school psychologist was demonstrated regarding their ability to contribute to data-based decision making. (Contains 20 references.) (JDM)