An operant condition where paradigm pain stimulus is given to a child for decreasing a certain undesired behaviour can be classified as -
Reinforcement
Positive reinforcement:- A reward is given on the performance of the desired behavior.
Negative reinforcement:- On the performance of the desirable behavior, punishment is avoided.
Punishment:- On performing an undesired behavior, an aversive stimulus (paradigm pain in this question) is given.
Note-The basic difference between reinforcement and punishment is that reinforcement (Positive or negative) is to promote desired behavior, on the other hand, punishment is to decrease undesired behavior.
Positive reinforcement
Negative reinforcement
Punishment
Negotiation