Ivan Pavlov

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1. 01

   If you always pair a neutral sound with something pleasant, the body can learn, without meaning to, to react to the sound as if the pleasant thing were already there.

   Conditioned Reflexes · 1927

   The body can automatically learn to associate a neutral stimulus with a pleasant response.

   Pavlov studied dogs' saliva and noticed something unexpected: after always ringing a bell before feeding them, the dogs began salivating just from hearing the bell, even with no food present. Their bodies had learned a new connection completely automatically, with no dog ever consciously deciding to do so.

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