Principles of Change: How Psychotherapists Implement Research in PracticePrinciples of Change constitutes a new approach to evidence based practice in psychotherapy that goes beyond the traditional and unidirectional dissemination of research, whereby clinicians are typically viewed as passive recipients of scientific findings. Based on an extensive review of literature, it first offers a list of 38 empirically based principles of change grouped into five categories: client prognostic, treatment provider moderating, client