Unbeknownst to the rest of the world, Roger was wearing green underwear when he aced his psychology test at the beginning of the
semester. Ever since, Roger always wears green underwear on test days in his college classes. In operant conditioning terms, Roger's behavior is the result of:
Accidental reinforcement occurs when a reinforcer casually concurs with a positive outcome, so the person associate the outcome with the reinforcer. This type of reinforcement is usually the source of superstitious behaviours.
In this case, Roger associated the fact of wearing green underwear to the good grade he got in his test, the green underwear was the reinforcer that casually concurs with the positive outcome which in this case was the good grade, so Roger started associating both and now he wears green underwear on test days.
