Professor Emeritus, Psychology, Suffolk University. Throughout my career, I have worked as a lifespan developmental psychologist with a focus on intellectual development, social development, and ego development. My research has emphasized psychotherapy and supervision of psychotherapy, as well as higher education and the workplace, as contexts for late adolescent and adult development. I have spent at least 50% of my time as a practicing lifespan developmental psychotherapist since 1984. I am currently using a dialectical-constructivist framework to integrate a wide range of approaches to psychotherapy, and to provide a developmental conceptualization of the fundamental processes by which all effective psychotherapy works, regardless of the therapist's theoretical or technical approach. Psychotherapy as a Developmental Process (see below) provides a set of research methods for tracking and studying these fundamental developmental processes within and across therapy cases. This framework, applicable to psychotherapy supervision and training, may also be used to understand how psychotherapy becomes stuck and to prevent "theoretical abuse" of clients by psychotherapy practitioners. Current research interests include (a) case studies of successful and unsuccessful psychotherapy using the methods of developmental analysis (b) clients' experiences of psychotherapy, (c) therapists' understandings of the nature of expertise in psychotherapy, and (d) the impact of therapists' forms of meaning-making on the therapy process. These interrelated lines of research are part of an overall attempt to articulate a comprehensive dialectical-constructivist life-span developmental model of psychotherapy process and psychotherapist training.