Behavior conditioning was described by Ivan Pavlov.
Ivan Pavlov was a Russian physiologist and psychologist who developed the concept of classical conditioning. He conducted experiments with dogs, in which he rang a bell before feeding them. Over time, the dogs began to associate the sound of the bell with the arrival of food and would begin to salivate at the sound of the bell even in the absence of food. This demonstrated how a conditioned response can be elicited by a previously neutral stimulus through association with an unconditioned stimulus. Pavlov's work had a significant impact on the field of psychology, particularly in the study of learning and behavior.