Effective ethnic-sensitive social work practice requires an understanding of the cultural compatibility between an intervention model and the client group. This study evaluated the cultural fit of psychoeducational family group treatment with ethnic Chinese and Malay families in Singapore. Process evaluation of five treatment groups determined that incompatibilities in beliefs, world views, and treatment expectations between the model and thc clients resulted in difficulties in client role behavior. Cognitive-behavioral interventions were partially successhl in facilitating members' participation in group activities and goal achievement. [Article copies available for a fee from The Haworth Document Deliven~ Service: 1-800- 342-9678. E-mail address: getinfo@haworth.com]Carl E. Bentelspacher, PhD, is a member of the faculty at