title: Incentive theory: IV. Magnitude of reward.
abstract: Incentive theory is successfully applied to data from experiments in which the amount of food reward is varied. This is accomplished by assuming that incentive value is a negatively accelerated function of reward duration. The interaction of the magnitude of a reward with its delay is confirmed, and the causes and implications of this interaction are discussed.
authors.forename: P R
authors.initials: PR
authors.lastname: Killeen