Relations between Cloninger's dimensions of temperament and steepness of delay and effort discounting of monetary rewards.

The aim of the study was to investigate the relationship between Cloninger's personality dimensions of temperament (Harm Avoidance, Novelty Seeking, Reward Dependence, and Persistence) and the steepness of delay and effort discounting, which refers to a decrease in the subjective value of a reward as its delay, or effort required to obtain the reward, increases. Participants (N = 112; ages 19 to 29 years, M = 21.80, SD = 1.35) filled out two inventories: the Temperament and Character Inventory (TCI) and the Discounting Questionnaire. The study revealed that the higher the Harm Avoidance and Reward Dependency, the steeper the effort discounting. On the other hand, the higher one's Persistence, the shallower one's effort discounting. Finally, a positive correlation was observed between delay and effort discounting. The results indicated that effort discounting was related to, but not equivalent to, delay discounting.