Interview on Sixty Minutes (31 March 1979)
Actual quote, which can be heard in Discovery Channel's Curiosity: How Evil Are You?: I would say -- on the basis of having observed a thousand people in the experiment, and having my own intuition shaped and informed by these experiments -- that if a system of death camps were set up in the United States of the sort we had seen in Nazi Germany, one would be able to find sufficient personnel for those camps in any medium-sized American town.
“I wish that people would be persuaded that psychological experiments, especially those on the complex functions, are not improved (by large studies); the statistical method gives only mediocre results; some recent examples demonstrate that. The American authors, who love to do things big, often publish experiments that have been conducted on hundreds and thousands of people; they instinctively obey the prejudice that the persuasiveness of a work is proportional to the number of observations. This is only an illusion.”
Alfred Binet (1903). L’Etude experimentale de l’intelligence. Paris: Schleicher Freres and Cie. p. 299; As cited in: Carson (1999, 360)
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Alfred Binet 21
French psychologist and inventor of the first usable intell… 1857–1911Related quotes

Speech https://api.parliament.uk/historic-hansard/lords/1921/dec/15/address-in-reply-to-his-majestys-most#column_112 in the House of Lords (15 December 1921).
1920s

Source: Mind, Self, and Society. 1934, p. 1

Great Books: The Foundation of a Liberal Education (1954)

Source: 1930s, Principles of topological psychology, 1936, p. 12-13.

Source: New Pathways In Psychology: Maslow and the Post-Freudian Revolution (1972), p. 15