When bill is driving faster than the speed limit, he covertly tells himself to slow down or he will get a ticket. he then slows down. bill's cognitive behavior of telling himself to slow down is functioning as a: ?

When Bill is driving faster than the speed limit, he covertly tells himself to slow down or he will get a ticket. he then slows down. Bill's cognitive behavior of telling himself to slow down is functioning as a: discriminative stimulus.
The term discriminative stimulus is used in operant conditioning to denote stimulus which is used consistently to gain a specific response and that increases the possibility that the desired response will occur.