Carl Rogers

American psychologist who developed client-centered (person-centered) therapy — arguing that unconditional positive regard, empathy, and congruence are the necessary and sufficient conditions for therapeutic change.

Client-centered therapy: the therapist's role is not to diagnose or direct but to provide a relational environment of unconditional positive regard, empathy, and congruence — the client has an actualizing tendency that does the rest. Person-centered approach: extended to education, conflict resolution, and group facilitation. Humanistic psychology: the third force after psychoanalysis and behaviorism.