classical conditioning is also called pavlovian conditioning due to pavlov's experiment with his dogs

classical conditoning animals acquire the expectation that a given stim predicts a specfic upcoming important event

• US - unconditioned stimulus (the original queue that evokes a response)
• NS - neutral stimulus (a stim that doesn't give a response)
• CS - conditioned stimulus (the new stim that evokes the reaction)
• CR - conditioned response (the response given after a neutral stim has been paired with a conditioned response used to condition a response)

dogs like hats