Final answer:
Operant Conditioning is not associated with Pavlov but with B.F. Skinner. Pavlov's contributions include Classical Conditioning, Extinction, and Conditioned Emotional Responses.
Step-by-step explanation:
The idea that is not one of Pavlov's major contributions to the field of psychology is B. Operant Conditioning. Ivan Pavlov is renowned for his work on Classical Conditioning, as in his famous experiments with dogs, which demonstrated how a neutral stimulus (like the ringing of a bell) could become a conditioned stimulus when paired with an unconditioned stimulus (the food), eliciting a conditioned response (salivation). This is distinct from Operant Conditioning, which involves an animal or human learning to associate a voluntary behavior with its consequences, a theory primarily developed by B.F. Skinner. Thus, Pavlov's contributions chiefly concern Classical Conditioning, Extinction, and Conditioned Emotional Responses, not Operant Conditioning.