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en
AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
21993
1989
1

jan 1, 1938 - B.F. Skinner: publishes The Behavior of Organisms, which describes operant conditioning of animals.

Added to timeline:

5 months ago
0
0
106
AP Psychology

Date:

jan 1, 1938
Now
~ 80 years ago
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