There are several important areas of overlap between family studies and psychotherapy and there have been some particularly interesting recent developments. The term •psychotherapy· is used here in a particularly wide sense, referring to any interactional treatment which aims to relieve emotional, behavioural or relationship dysfunctions or problems. In particular, of course, we will be concerned with those therapeutic techniques which focus on the individual within a family context or which treat the family as a unit. The problem area covered is wider than that of traditional psychiatry and includes personal and social problems such as truanting, marital conflict, difficulties in the forming or maintaining of relationships, and sexual dysfunction.