The prestigious research group Boston Group brings together psychoanalysis, infant research, cognitive neuroscience, and developmental psychology. The world-renowned clinicians and researchers reveal in this groundbreaking book the underlying factors that make psychotherapy successful in facilitating processes of change - a foundational work! "By acknowledging both the unique fit of the two partners in a psychotherapy and the potential disruptions that characterize their interactions, the authors formulate a theory of development and treatment that can provide guidance to any clinician conducting psychotherapies and psychoanalyses." (Frank M. Lachmann).