# 49. Manipulation of bias and heuristics in decision making ## 49.5. Methodology/Refinements/Sub-species ### 49.5.29. Hyperbolic discounting People often have a stronger preference for more immediate payoffs rather than for later rewards. A manipulator can augment an incentive for a victim by moving the reward closer to the effort. This is a primary principle of "Payment by Results" incentive schemes which state "keep the reward close at hand".