The necessary and sufficient conditions of therapeutic personality change

"For constructive personality change to occur, it is necessary that these conditions exist and continue over a period of time: (1) Two persons are in psychological contact. (2) The first, whom we shall term the client, is in a state of incongruence, being vulnerable or anxious. (3) The second person, whom we shall term the therapist, is congruent or integrated in the relationship. (4) The therapist experiences unconditional positive regard for the client. (5) The therapist experiences an empathic understanding of the client's internal frame of reference and endeavors to communicate this experience to the client. (6) The communication to the client of the therapist's empathic understanding and unconditional positive regard is to a minimal degree achieved."