History
ingrid2s
2015-11-16 13:10:27
From 1920s to 1960s american psychologists emphasized the study of
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TaniaBardney443
2015-11-16 15:40:58

The answer for this question is: Observable behavior Before this period, American psychologist was really fascinated with the study of the mental life. Because of the development in industrial technology, many companies started to put a lot of money in order to research observable behavior so they could expand their target market.

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