AP BIOLOGY

Detailed explanation-1: -Classical conditioning was stumbled upon by accident. Pavlov was conducting research on the digestion of dogs when he noticed that the dogs’ physical reactions to food subtly changed over time. At first, the dogs would only salivate when the food was placed in front of them.

Detailed explanation-2: -During the 1890s, Ivan Pavlov was a Russian physiologist who was researching salivation in dogs as a response to being fed.

Detailed explanation-3: -Ivan Pavlov was a Russian physiologist best known in psychology for his discovery of classical conditioning. During his studies on the digestive systems of dogs, Pavlov noted that the animals salivated naturally upon the presentation of food.

Detailed explanation-4: -It was at the Institute of Experimental Medicine in the years 1891-1900 that Pavlov did the bulk of his research on the physiology of digestion.