Drive: The Surprising Truth about What Motivates Us by Daniel H. Pink (English)
21,31 €
Harlow"s puzzle in the starting (left) and solved (right) positions. Now, this was a bit odd. Nobody had taught the monkeys howto remove the pin, slide the hook, and open the cover. Nobody hadrewarded them with food, affection, or even quiet applause whenthey succeeded.
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