Lintas2025NFEDERP

Title

Neuroimaging Fairness in Economic Decisions: EEG and EROS Analysis in the Ultimatum Game
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Authors

Alessandra Lintas, Ramisha S. Knight, Alessandro E.P. Villa

Abstract

This study investigates how the brain processes fairness decisions during the Ultimatum Game by analyzing neural activity (using Event Related Potentials, ERPs, and Event Related Optical Signals) in two groups of participants distinguished by personality and mood profiles. The \emph{proself} group, characterized by positive mood and traits like prudence and forgiveness, was more likely to accept unfair offers. The \emph{prosocial} group, marked by adventurousness and lower modesty, more frequently rejected unfair offers. Neural measurements revealed that proself individuals showed earlier and smaller P200 ERP responses and less right frontal activation during rejection, while prosocial individuals exhibited stronger DLPFC and right temporal junction activity when rejecting unfair offers. These findings indicate that both the timing and location of brain activity during fairness decisions are closely linked to personality traits, and that fast optical signals reliably track these neural dynamics alongside traditional electrophysiological markers.

KeyPhrases

Decision making; Ultimatum Game; right frontal lobe; dorsolateral prefrontal cortex; frequency domain functional near-infrared spectroscopy; fast optical neuroimaging.

Dates

Created 2025-05-01, presented 2025-06-03, published 2025-07-18.

Citation

Brainiacs Journal 2025 Volume 6 Issue 1 Edoc UD194FE74
DOI: 10.48085/UD194FE74
PDP: Nexus/Brainiacs/Lintas2025NFEDERP
URL: BrainiacsJournal.org/arc/pub/Lintas2025NFEDERP