Law of Effect. This principle, developed by Edward Thorndike, states that responses that produce a satisfying or pleasant outcome are more likely to be repeated.
Law of effect:
The law stated that "any behavior that is followed by pleasant consequences is likely to be repeated, and any behavior followed by unpleasant consequences is likely to be stopped."
Responses that result in satisfaction or reward are strengthened and are more likely to be repeated.
Conversely, responses that result in discomfort or dissatisfaction are weakened and less likely to occur again.