The tendency to approach a goal increases with proximity to the goal.
The goal-gradient hypothesis, originally proposed by the behaviorist Clark Hull in 1932, states that the tendency to approach a goal increases with proximity to the goal. In a classic experiment that tests this hypothesis, Hull (1934) found that rats in a straight alley ran progressively faster as they proceeded from the starting box to the food. Although the goal-gradient hypothesis has been investigated exten-sively with animals (e.g., Anderson 1933; Brown 1948; for a review, see Heilizer 1977), its implications for human behavior and decision making are understudied. Further-more, this issue has important theoretical and practical implications for intertemporal consumer behavior in reward programs (hereinafter RPs) and other types of motivational systems (e.g., Deighton 2000; Hsee, Yu, and Zhang 2003; Kivetz 2003; Lal and Bell 2003).
Peak - End Rule
People judge an experience largely based on how they felt at its peak and at its end, rather than the total sum or average of every moment of the experience.