Broadly, self-regulation encompasses a person's capacity to adapt the self as necessary to meet demands of the environment.[2] Delaying gratification is the reverse of delay discounting, which is "the preference for smaller immediate rewards over larger but delayed rewards" and refers to the "fact that the subjective value of reward decreases with increasing delay to its receipt".[3] It is theorized that the ability to choose delayed rewards is under the control of the cognitive-affective personality system (CAPS).[4]