In the 1950s scientist Harry Harlow performed a series of experiments with young monkeys.  He sought out to demonstrate the importance of a nurturing environment on the psychological welfare of the young monkeys.  He setup quite an interesting A/B test with a newborn monkey in a cage.  His techniques and results may be surprising to most and are very informative.

The video on the next page shows the interesting way the monkeys reacted to his test

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