Effectiveness of self-reinforcement in improving the performance of a motor task was examined in 77 college students. After a session of practice, visual and auditory cues for the performance were eliminated, and subjects were reinforced when they actually made a correct response (ER group), when they thought that they made a correct response (SR groups), or without any instruction (Control group). They were all allowed to make a practice in the presence of external feedback after every ten trials. There was a marked improvement in the performance of SR groups, as much as in the ER group; the number of correct responses increased and the response converged on a self-imposed standard. These effects were absent if the subjects were not allowed to make practice after every ten trials.
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