AP BIOLOGY

Detailed explanation-1: -Ivan Pavlov was a Russian physiologist that discovered Classical Conditioning in the early 1900s. He found that if the sound of a tone (a stimulus or S) reliably predicted the occurrence of food (a biologically relevant stimulus or S*), the dog would learn to salivate to the tone.

Detailed explanation-2: -Ivan Petrovich Pavlov (1849–1936) was a physiologist, not a psychologist. During the 1890s, Russian physiologist, Ivan Pavlov was researching salivation in dogs in response to being fed. He inserted a small test tube into the cheek of each dog to measure saliva when the dogs were fed (with a powder made from meat).

Detailed explanation-3: -During the 1890s, Ivan Pavlov was a Russian physiologist who was researching salivation in dogs as a response to being fed. While the dogs were being fed, he used a small test tube to measure the saliva by inserting it into their cheeks.

Detailed explanation-4: -Classical conditioning (also known as Pavlovian or respondent conditioning) is learning through association and was discovered by Pavlov, a Russian physiologist. In simple terms, two stimuli are linked together to produce a new learned response in a person or animal.