Psychologists use psychotherapy help people of all ages live productive, happy, and healthy lives. Psychologists usually have special training in understanding research that helps them incorporate the latest, most proven strategies in their practice. Psychologists use research-supported techniques to help people develop more accurate perspectives and effective habits. There are several approaches to psychotherapy, including cognitive-behavioral, interpersonal and behavioral. Psychotherapy is a collaboration, and it is based on the relationship between an individual and a psychologist. Most therapy focuses on individuals, although psychotherapists also work with couples, families and groups. Involvement of the whole family is often important when working with children and adolescents.