AStanley Hall
BMcClelland
CIan Pavlov
DB.F. Skinner
Answer:
C. Ian Pavlov
Read Explanation:
Ivan Pavlov (1849-1936) was a Russian physiologist and Nobel laureate who made significant contributions to psychology, including the discovery of classical conditioning and the development of behavior therapy:
- Classical conditioning - Pavlov's experiments with dogs in the 1890s demonstrated that a neutral stimulus, like a bell, could be associated with a positive stimulus, like food. This association, called a conditioned response, became the foundation of classical conditioning theory. 
- Behavior therapy - Pavlov's work was central to the founding of behavior therapy in the 1950s. His discovery of "experimental neuroses" showed that conditioning and counterconditioning could be used to produce and eliminate them. 
- Behaviorism - Pavlov's work contributed to the development of behaviorism, a school of psychology that holds that psychology should be studied through behavior. 
- Nobel Prize - Pavlov won the Nobel Prize in Physiology or Medicine in 1904 for his work on digestive secretions. 
- Transmarginal inhibition - Pavlov and his researchers studied the body's natural response to overwhelming stress or pain, called transmarginal inhibition (TMI). 



