A group of scientists placed 5 monkeys in a cage and in the middle a ladder with bananas on top...
The experiments of Harry Harlow and his associates at the Primate Laboratory of the University of Wisconsin are described in the textbook Principles of General Psychology (1980 John Wiley and Sons)
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sources: Why Don't You Try This, Webfail
Editors' Recommendations:
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sources: Why Don't You Try This, Webfail