The third edition of this book is an updated and expanded presentation of the widely used Integrative Developmental Model of Supervision. In contrast to other volumes on clinical supervision, Stoltenberg and McNeill present a comprehensive, time-tested, and empirically investigated model of supervision, rather than a broad summary of other existing or historical approaches. In addition to presenting a model of therapist development that spans beginning through advanced training, the book integrates theory and research from numerous perspectives, including learning, cognition, and emotion, as well as an up-to-date treatment of research directly addressing the supervision process. The model also examines the role of clinical supervision from an evidence-based practice perspective and addresses issues of common factors in therapy. The impact of cultural issues in supervision and training, as well as recent work in a competencies approach to supervision and trainee development, are also examined.