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In the 1950s, sensory deprivation research emerged as an influential new field for behavioral science researchers, supported by the intelligence community. Within a few years, deprivation research had become ubiquitous; images of sensory deprivation were invoked to explain a wide range of phenomena, from religious revelations to the very structure of psychoanalysis. Yet within a decade and a half, this field of research became implicated in cases of torture and abuse. This article examines the history of University of Manitoba psychologist John Zubek, who remained one of the final researchers still conducting sensory deprivation research in the 1970s. It raises questions on how might it be possible to successfully and cautiously perform controversial research.

In 1951 John Bowlby, British psychoanalyst and child psychiatrist, published his now famous report, Maternal Care and Mental Health, commissioned by the World Health Organization. In this report, Bowlby coined the term 'maternal deprivation', which quickly permeated into Western psychiatry and psychology. The implications of Bowlby's writings, while widely criticized and contested, generated a considerable amount of research and brought about significant changes in perceptions of separation between children and their mothers. This article examines the origins of the 'maternal deprivation' hypothesis, focusing on how the deficiency theory of disease influenced psychiatric discourse, and framed Bowlby's theory of maternal care. We argue that developments in paediatric medicine, and particularly in the field of nutritional deficiencies, provided Bowlby a prototype for conceptualizing his early views on the psychological needs of children and the development of psychopathology.