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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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Group values modulate ingroup bias in self-referential processing: Evidence from event-related potentials.

Qianwen Gao1, Wanxia Chen2, Feng Zou2

  • 1School of Health Management, Xinxiang Medical University, Xinxiang, Henan, 453003, China.

Neuropsychologia
|December 11, 2025
PubMed
Summary

Group values influence self-perception by altering neural responses during self-referential tasks. The anterior Late Positive Potential (LPP) reflects how deeply individuals integrate group values into their self-concept.

Keywords:
Event-related potentials (ERPs)Group valuesIngroup biasLate Positive Potential (LPP)Self-referential processing

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Area of Science:

  • Social Psychology
  • Cognitive Neuroscience
  • Neuroscience

Background:

  • Ingroup bias is common in self-referential processing.
  • The neural mechanisms by which group values influence this bias are not well understood.

Purpose of the Study:

  • To investigate how group values modulate ingroup bias at the neural level during self-referential judgments.
  • To examine the electrophysiological correlates of value-self integration.

Main Methods:

  • Utilized event-related potentials (ERPs) and a minimal group paradigm.
  • Participants judged neutral trait words describing themselves in a 2x2 within-participants design (group: ingroup/outgroup; trait value: highly-valued/low-valued).

Main Results:

  • Behaviorally, faster reaction times and higher endorsement rates were observed for ingroup and highly-valued traits.
  • Electrophysiologically, the anterior Late Positive Potential (LPP) was enhanced for ingroup-highly-valued traits.
  • A negative correlation between anterior LPP amplitude and behavioral endorsement rate indicated deeper value internalization.

Conclusions:

  • Group values shape self-concept integration by modulating late, elaborate self-processing.
  • The anterior LPP serves as a neural marker for value-self integration.
  • Social context significantly influences the neurocognitive basis of self-construction.