Prediction of delay discounting in intertemporal decisions by future thinking: Accounting for fluency, contents, and functions of future thoughts

Fatemeh Eivazi; Javad Hatami; Alireza Moradi; Mohammad-Reza Nazem-Zadeh

doi:10.1002/brb3.2764

Prediction of delay discounting in intertemporal decisions by future thinking: Accounting for fluency, contents, and functions of future thoughts

Brain Behav. 2022 Oct;12(10):e2764. doi: 10.1002/brb3.2764. Epub 2022 Sep 19.

Authors

Fatemeh Eivazi¹, Javad Hatami², Alireza Moradi³, Mohammad-Reza Nazem-Zadeh^{4

5}

Affiliations

¹ Shahid Beheshti University, Institute for Cognitive and Brain Sciences, Tehran, Iran.
² Department of Psychology, Faculty of Psychology and Education, University of Tehran, Tehran, Iran.
³ Department of Clinical Psychology, Faculty of Psychology and Education, Kharazmi University, Tehran, Iran.
⁴ Tehran University of Medical Sciences, Research Center for Molecular and Cellular Imaging, Advanced Medical Technologies and Instruments Institute (AMTII), Tehran, Iran.
⁵ Physics and Biomedical Engineering Department, Tehran University of Medical Sciences, Tehran, Iran.

Abstract

Purpose: To study the variations of delay discounting rates as a function of fluency, contents, and functions of future thoughts in healthy subjects.

Background: Delay discounting (DD) is a concept that can measure a frequent tendency toward smaller, yet immediate rewards, while a delayed reward is greater in value. DD describes people's choices in intertemporal decisions and is associated with self-control. Future thinking (FT) and having a vivid imagination of the future can reduce individuals' DD rates. However, constructing a specific episodic future representation was merely studied in relation to DD. Although fluency and contents of future thoughts have been reported related to various disorders and behaviors, their association with DD has not been previously addressed.

Methods: The present study applies a verbal fluency task named the personal future task (PFT), the functions of future thinking scale (FoFTS), and the 27-item delay discounting questionnaire (DDQ) in order to assess fluency, contents, and functions of future thoughts, and delay discounting in healthy subjects (N = 114, Female = 64%, Male = 36%, Mage = 34.22, SDage = 7.15).

Results: Findings indicate that fluency of future thoughts is associated with DD. Among the contents of FT categories, financial contents (future thoughts about money and real estate matters), and regarding functions of FT, engaging in FT for planning are related to DD. Due to the final model, the above-mentioned correlated variables can be considered as significant predictors of intertemporal choices when controlling for education and gender (R² = 0.4, Adjusted R² = 0.33, F = 5.186, p-value = 0.001).

Conclusion: The frequency of future thoughts one can generate, specifically future thoughts about financial contents, is associated with less short-sighted intertemporal decisions. The former relationship is enhanced for longer delays (e.g., 5-10 years). Besides, individuals who frequently engage in FT for planning (planning out sequences of actions) discount future rewards to a lesser extent.

Keywords: delay discounting; future cognition; future thinking; intertemporal decision-making.

MeSH terms

Delay Discounting*
Female
Humans
Imagination
Male
Reward