1. Pavlov found that whenever food was presented in front of a dog, it would start to salivate (UCS+UCR).
Pavlov's Classical Conditioning
*Several tries later*
2. He decided to insert a neutral event (stimulus) in the situation that would not normally be associated with food. The stimulus in his experiment was a bell. Ringing the bell on its own would not result in the dog salivating.
3. Pavlov then rang the bell (NS) before presenting the food (UCS) to the dog, and found that the dog salivated (UCR).
4. Pavlov carried out several tries over the course of many days, which turned the NS into a CS, which then produced the CR. This caused the learned response of salivating to the bell when it was presented on its own.
5. At the ring of the bell, without the presence of food, the dog would salivate on its own.