The Role of Prospection in Steep Temporal Reward Discounting in XXXX .

@entity11532 @entity1315 @entity308
UNASSIGNED: Addiction and @entity11532 ( @entity11532 ) have been consistently associated with high impulsivity and a steep devaluation of delayed rewards, a process that is known as @entity1315 ( @entity1315 ). Recent studies indicated that enhanced episodic future thinking (EFT) results in less impulsive @entity1315 in healthy controls (HCs). In a separate line of research, it has been suggested that non-linearities in time perception might contribute to reward devaluation during inter-temporal choice. Therefore, in addition to deficits in valuation processes and executive control, impairments in EFT and non-linearities in time perception have been hypothesized to contribute to steep @entity1315 in addiction. In this study, we explore such a potential association of impairments in EFT and time perception with steep @entity1315 in @entity11532 . We investigated 20 PGs and 20 matched HCs. @entity1315 was assessed via a standard computerized binary choice task. EFT was measured using a variation of the Autobiographical Memory Interview by Levine et al. (1). Time perception was assessed with a novel task, utilizing a non-linear rating procedure via circle-size adjustments. Groups did not differ in baseline EFT. In both groups, a power law accounted time perception best, and the degree of non-linearity in time perception correlated with discounting across groups. A multiple regression analysis across all predictors and covariates revealed that only group status ( @entity11532 /HC) and @entity308 were significantly associated with discounting behavior such that @entity11532 increased @entity1315 and @entity308 attenuated @entity1315 . Our findings speak against the idea that steep @entity1315 in @entity11532 is due to a skewed perception of time or impairments in EFT, at least under the present task conditions. The lack of overall group differences in EFT does not rule out the possibility of more complex interactions of EFT and decision-making. These interactions might be diminished in @entity11532 or addiction more generally, when other task configurations are used.
