Classical conditioning involves learning through repeated associations between stimuli. Pavlov first described this in 1899 through his experiments with dogs. He found that when a neutral stimulus (a bell) was repeatedly paired with an unconditional stimulus (food) that naturally elicits a response (salivation), the neutral stimulus would come to elicit the same response. Specifically: 1) Before conditioning, the bell alone did not produce salivation in dogs but food did as an unconditional stimulus. 2) During conditioning, Pavlov repeatedly rang the bell before providing food, leading the dog to associate the two. 3) After conditioning, the dog would salivate to the bell alone, as it had become a conditional stimulus that elicited the