This work is a comprehensive analysis and guideline intended to acquaint the reader with the fundamental principles, theory and methods of making clinical and casework decisions about the effectiveness of psychological counselling. The text is designed for college courses and as a desk reference for social work practitioners and counsellors. It examines the total system of clinical input, and the process and outcome of assessment. It also cross-references evaluative principles with client diagnosis profiles and developmental progression, as assessment data and therapeutic methods change with time and situational content. The book also integrates ethnology and cultural factors to index or skew evaluation in significant ways, while maintaining sensitivy to differing evaluative dimensions.