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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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22 fev 1920 ano - John B. Watson and Rosalie Rayner published the Little Albert experiments, demonstrating that fear could be classically conditioned

Adicionado na linha do tempo:

11 dez 2017
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Data:

22 fev 1920 ano
Agora
~ 105 years ago