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Keywords:

  • psychotherapy research;
  • empirically supported therapy;
  • comparative efficacy of psychother-apies

Luborsky et al.'s conclusion that there are no meaningful differences in the efficacy of various psychothera-pies should be reconsidered for the following reasons: (a) errors in data analysis, (b) exclusion of research on many types of clients (e.g., children and adolescents), (c) faulty generalization to comparisons between therapies that have never been made, and (d) erroneous assumption that the average difference between all sorts of treatments for all sorts of problems can be assumed to represent the difference between any two types of treatment for a given problem. Concern for clients' welfare demands that psychologists be very wary of accepting the Dodo bird verdict.