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The Joint Effect of Social Comparison and Social Distance on Evaluation of Intertemporal Choice Outcomes in Event-related Potential Studies
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Intrinsic non-hub connectivity predicts human inter-temporal decision-making.

Qiang Wang1,2,3, Yuxuan Zhu2, Yajie Wang2

  • 1Key Research Base of Humanities and Social Sciences of the Ministry of Education, Academy of Psychology and Behavior, Tianjin Normal University, Tianjin, 300387, China.

Brain Imaging and Behavior
|October 10, 2020
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Summary

Brain connectivity patterns in the limbic system predict how individuals make inter-temporal decisions. Stronger connectivity in non-hub regions is linked to lower discounting rates, offering insights into decision-making mechanisms.

Keywords:
Functional connectivity strengthHub regionInter-temporal decision-makingMultivariate pattern analysis

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Decision Science

Background:

  • Inter-temporal decision-making involves trading off immediate rewards for future benefits.
  • This complex cognitive process is crucial for individual success.
  • Previous research identified hub regions in the brain for these decisions, but connectivity's predictive role remains unclear.

Purpose of the Study:

  • To investigate if whole-brain voxel-wise functional connectivity strength can predict discounting rates.
  • To explore the relationship between functional connectivities of hub and non-hub brain regions and discounting behaviors.

Main Methods:

  • Utilized graph-theoretical algorithms and multivariate pattern analysis.
  • Examined functional connectivity strength across the entire brain.
  • Employed an adaptive delay-discounting task to measure discounting rates (logk) in 429 young adults.

Main Results:

  • Found inverse associations between short- and long-distance non-hub functional connectivity in the limbic system (medial orbitofrontal cortex, parahippocampus) and discounting rates.
  • These findings were robust against potential confounding factors.
  • The weight-based degree metric indicated patterns of local and global parallel information processing.

Conclusions:

  • Functional connectivity within the limbic system, particularly in non-hub regions, plays a significant role in inter-temporal decision-making.
  • Brain topological organization provides novel insights into the neural mechanisms underlying discounting behavior.
  • This study advances our understanding of the neural basis of how individuals value future rewards.