<P> Systems or family therapy works with couples and families, and emphasizes family relationships as an important factor in psychological health . The central focus tends to be on interpersonal dynamics, especially in terms of how change in one person will affect the entire system . Therapy is therefore conducted with as many significant members of the "system" as possible . Goals can include improving communication, establishing healthy roles, creating alternative narratives, and addressing problematic behaviors . </P> <P> There exist dozens of recognized schools or orientations of psychotherapy--the list below represents a few influential orientations not given above . Although they all have some typical set of techniques practitioners employ, they are generally better known for providing a framework of theory and philosophy that guides a therapist in his or her working with a client . </P> <Ul> <Li> Existential--Existential psychotherapy postulates that people are largely free to choose who we are and how we interpret and interact with the world . It intends to help the client find deeper meaning in life and to accept responsibility for living . As such, it addresses fundamental issues of life, such as death, aloneness, and freedom . The therapist emphasizes the client's ability to be self - aware, freely make choices in the present, establish personal identity and social relationships, create meaning, and cope with the natural anxiety of living . </Li> </Ul> <Li> Existential--Existential psychotherapy postulates that people are largely free to choose who we are and how we interpret and interact with the world . It intends to help the client find deeper meaning in life and to accept responsibility for living . As such, it addresses fundamental issues of life, such as death, aloneness, and freedom . The therapist emphasizes the client's ability to be self - aware, freely make choices in the present, establish personal identity and social relationships, create meaning, and cope with the natural anxiety of living . </Li>

Who had the greatest influence on the early development of clinical psychology