Elton Mayo
Mayo's credentials

Although biographers agree about Mayo's contributions, there is no consensus about his credentials. The Encyclopædia Britannica, biographical dictionaries, and some published texts indicate that Mayo was a psychologist. Some authors and critics have discussed Mayo's credentials and his various other job titles during his career in the United States. Cullen does not mention that Mayo was a psychologist although Cullen noted that Mayo let interlocutors call him "Dr. Mayo," letting himself be cast as a Ph.D. in one of the social sciences, without correcting the mistake. Mayo's biographer Trahair wrote, "Mayo was not a psychologist, sociologist, or anthropologist, although sometimes he was cast as such" (p. 357). Trahair also wrote that "after the great war Mayo's reputation grew as a successful academic, clinical psychologist and public speaker" (p. 89). Of course having a reputation as a clinical psychologist does not necessarily make one a clinical psychologist (the public often thinks of psychotherapists, regardless of training, as clinical psychologists or even psychiatrists).
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