Delay of gratification dissociates cognitive control and valuation brain regions in healthy young adults

Lamichhane, Bidhan; Di Rosa, Elisa; Braver, Todd S. · 2022 · Crossref

DOI: 10.1016/j.neuropsychologia.2022.108303

archive: archived pipeline: cataloged verified

Get this paper ↗ (DOI — opens at the source; we link to it, we don't host it)

Summary

This study addresses a critical gap in the neuroeconomics and cognitive control literature: the lack of experimental tools to investigate the neural basis of Delay of Gratification (DofG) in healthy human adults. While DofG—defined as the ability to resist immediate temptation for a larger, delayed reward—is well-studied in children and animals, adult research has predominantly relied on Delay Discounting (DD) tasks. DD tasks typically involve single choices between immediate and delayed rewards without actually experiencing the waiting period, failing to isolate the repeated self-control demands inherent in DofG. The authors aimed to dissociate the neural mechanisms of cognitive control from subjective reward valuation by adapting a novel DofG paradigm for functional magnetic resonance imaging (fMRI). The researchers employed a task where participants chose between two reward options: a Progressive-Interval (PI) option with increasing delays and a Fixed-Interval (FI) option with a constant 40-second delay. Crucially, selecting the FI option reset the PI delay to its minimum, making it the optimal strategy for maximizing reward rate. Twenty-two healthy young adults performed this task inside an fMRI scanner across multiple runs, including learning phases and instructed strategy phases. The experimental design allowed for the isolation of "Choose-to-Wait" (CW) events, where participants actively decided to continue waiting for the delayed FI reward despite the availability of the immediate PI reward. fMRI data were preprocessed using fMRIPrep and analyzed using General Linear Models to examine event-related neural activity during CW decisions and the waiting periods. The results revealed a clear dissociation between brain regions associated with cognitive control and those involved in valuation. CW events were associated with increased activation in fronto-parietal and cingulo-opercular networks, regions linked to cognitive control. Activity in the right lateral prefrontal cortex specifically correlated with individual variability in task performance and strategy implementation. In contrast, the ventromedial prefrontal cortex (vmPFC) exhibited a dynamic "ramping-up" pattern of activity during the waiting period prior to reward delivery. This vmPFC activity was selective to trials associated with increased future reward rates, indicating its role in subjective reward valuation that incorporates higher-order task structure, rather than self-control per se. These findings provide initial validation of the adapted DofG paradigm as a robust tool for isolating unique neural mechanisms of self-control in adults. By demonstrating that fronto-parietal control networks and vmPFC valuation networks are functionally dissociable during DofG, the study clarifies the distinct contributions of cognitive control and subjective valuation to intertemporal choice. This methodological advancement allows for future investigations into how these neural systems operate across diverse populations and clinical conditions, offering a more precise understanding of impulsivity and self-regulation than previously available through DD tasks.

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed.

Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.

Topics

Ranked by relevance to this paper. Hover a topic for its definition.

• executive function