ISSN 0439-755X
CN 11-1911/B

Acta Psychologica Sinica ›› 2026, Vol. 58 ›› Issue (1): 15-38.doi: 10.3724/SP.J.1041.2026.0015

• Reports of Empirical Studies • Previous Articles     Next Articles

Acute pain modulates personal and vicarious reward processing: An ERP study

LIU Peihan1, PENG Weiwei2, WANG Jinxia1, LI Hong1, LEI Yi1()   

  1. 1Institute for Brain and Psychological Sciences, Sichuan Normal University, Chengdu 610066, China
    2School of Psychology, Shenzhen University, Shenzhen 518060, China
  • Published:2026-01-25 Online:2025-10-28
  • Contact: LEI Yi, E-mail: leiyi821@vip.sina.com
  • About author:The original article is in Chinese. The Chinese version shall always prevail in case of any discrepancy or inconsistency between the Chinese version and its English translation.

Abstract:

Pain and reward are two fundamental forces that motivate behavior and regulate perceptions in humans. The interactions between these forces drive motivational decision-making. This study employed a modified Monetary Incentive Delay (MID) task combined with Event-Related Potential (ERP) techniques to examine the dynamics of reward processing under acute pain, with particular focus on the stage-specific modulation of self-oriented (personal) and other-oriented (vicarious) rewards in healthy individuals.
The results indicate that acute pain can significantly enhance reward-based motivation during the anticipation phase, as reflected by faster reaction times and increased button presses, with a linear increase corresponding to the magnitude of the potential reward. ERP findings reveal that, in the anticipation phase, participants in the pain group exhibited larger cue-P2 and cue-P3 amplitudes; this suggests heightened emotional processing of reward cues and increased attentional allocation to vicarious rewards. Greater FRN and P3 amplitudes were observed in the pain group under vicarious reward conditions in the outcome phase, indicating enhanced neural responses to socially directed reward feedback.
Together, these results demonstrate a stage-dependent influence of acute pain on reward processing: while motivational responses uniformly increased across reward types, emotional and neural responses were more prominently modulated for vicarious rewards. These findings provide novel evidence of the complex interplay between pain and reward systems and suggest a duality in pain-related modulation—motivational convergence and experiential dissociation—within the reward processing framework.

Key words: acute pain, monetary reward, personal reward, vicarious reward, reward anticipation stage, reward experience stage, ERP