Clinicians are often faced with decisions concerning whether to use a new or different treatment approach. What factors influence these decisions? Are clinicians more influenced by treatment efficacy studies or their own theoretical biases? What role do parents and families play in influencing these decisions? Why are scientists so skeptical of new treatment approaches? When should a clinician try out a new or different treatment approach? Should clinicians be trusted to use the best treatment

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... pproaches? These are the central questions addressed in this article.