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The Dodo bird verdict (or Dodo bird conjecture) is a controversial topic in psychotherapy, referring to the claim that all psychotherapies, regardless of their specific components, produce equivalent outcomes. The conjecture was introduced by Saul Rosenzweig in 1936, drawing on imagery from Lewis Carroll's novel ''Alice's Adventures in Wonderland'', but only came into prominence with the emergence of new research evidence in the 1970s.〔.〕 The importance of the continuing debate surrounding the Dodo bird verdict stems from its implications for professionals involved in the field of psychotherapy and the psychotherapies made available to clients. ==History== The ''Dodo bird verdict'' terminology was coined by Saul Rosenzweig in 1936 to illustrate the notion that all therapies are equally effective.〔.〕〔.〕 Rosenzweig borrowed the phrase from , wherein a number of characters become wet and, in order to dry themselves, the Dodo Bird decided to issue a competition: everyone was to run around the lake until they were dry. Nobody cared to measure how far each person had run, nor how long. When they asked the Dodo who had won, he thought long and hard and then said "Everybody has won and all must have prizes." In the case of psychotherapies, Rosenzweig argued that common factors were more important than specific technical differences, so that (on the Dodo bird conjecture) all therapies are winners; they all produce equally effective outcomes.〔 The Dodo bird debate only took flight in 1975 when Lester Luborsky, Barton Singer and Lise Luborsky reported the results of one of the first comparative studies demonstrating few significant differences in the outcomes among different psychotherapies.〔 This study spurred a plethora of new studies in both opposition to and support of the Dodo bird verdict.〔.〕 The Dodo bird debate, in brief, is focused on whether or not the specific components of different treatments lead some treatments to outperform other treatments for specific disorders. Supporters of the Dodo bird verdict contend that all psychotherapies are equivalent because of "common factors" that are shared in all treatments (i.e., having a relationship with a therapist who is warm, respectful, and has high expectations for client success).〔.〕〔.〕 In contrast, critics of the Dodo bird verdict would argue that the specific techniques used in different therapies are important, and all therapies do not produce equivalent outcomes for specific disorders. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dodo bird verdict」の詳細全文を読む スポンサード リンク
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