The term “outsider witness groups” comes specifically from narrative therapy. In this approach, clients tell and re-author their stories, and selected others (outsider witnesses) listen to these stories and then respond by sharing what moved or resonated with them. This process:

Brings in social resources and supportive witnesses.

Strengthens the client’s preferred identity and alternative story.

Helps the client feel seen and supported in a broader community context.

Thus, option D. Narrative therapy is correct.

Adlerian therapy (A) uses family constellation, early recollections, and encouragement, but not outsider witness groups as a standard technique.

Gestalt therapy (B) emphasizes experiential awareness, here-and-now work, and empty-chair techniques.

Community psychology (C) incorporates social systems and resources but does not specifically use “outsider witness groups” as conceptualized in narrative therapy.

NBCC Counselor Work Behaviors expect counselors to know the distinctive concepts and methods of major counseling theories, including narrative therapy’s use of outsider witnesses to support client change.