Final answer:
Client-centered therapy requires unconditional positive regard, genuineness, and empathy as necessary and sufficient conditions for therapeutic change, focusing on the client’s potential for self-healing.
Step-by-step explanation:
The necessary and sufficient conditions for therapeutic change according to client-centered therapy, as developed by Carl Rogers, include unconditional positive regard, genuineness, and empathy. Unconditional positive regard means that the therapist accepts and supports the client regardless of what the client says or does. Genuineness refers to the therapist's authentic presence within the therapeutic relationship, being open and honest. Finally, empathy is the therapist's ability to understand the client’s feelings and perspectives deeply and to convey that understanding back to the client. These core conditions are believed to create a growth-promoting climate where individuals can move forward and fulfill their potential. Notably, this approach contrasts with psychoanalytic methods that focus on interpreting the unconscious mind through the therapist's leading role.