15. The principle of reinforcement is associated with
(1) Thorndike
(2) Skinner
(3) Pavlov
(4) Kohlberg
Ans- (4) Pavlov
Reason:- block proposed the principle of reinforcement by experimenting on a dog. The principle describes that between conditioned and unconditioned stimuli. This is based on the idea that the results of an action influence the future and behaviour.