1. a school of psychology that regards the objective observation of the behaviour of organisms (usually by means of automatic recording devices) as the only proper subject for study and that often refuses to postulate any intervening mechanisms between the stimulus and the response
  2. the doctrine that the mind has no separate existence but that statements about the mind and mental states can be analysed into statements about actual and potential behaviourCompare materialism (def. 2) See also mind-body problem
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