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Related Experiment Video

Updated: Nov 6, 2025

A Modified Mirror Test as a Visual Guide for the Self-awareness Trait in Wild Antarctica Penguins, Pygoscelis adeliae
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Late frontal positivity effects in Self-referential Memory: Unique to the Self?

Nicole A Porter1, Eric C Fields1,2, Isabelle L Moore1

  • 1Department of Psychology, Brandeis University, Waltham, MA, USA.

Social Neuroscience
|May 12, 2021
PubMed
Summary

The self-reference effect (SRE) enhances memory for self-related information. This study found a frontal positivity in EEG, linked to deeper encoding, which is triggered by self-referencing but not exclusive to it.

Keywords:
eegerpmemoryselfself-referencingsubsequent memory

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Area of Science:

  • Cognitive Neuroscience
  • Psychology
  • Neuroscience

Background:

  • The self-reference effect (SRE) demonstrates enhanced memory for self-related stimuli.
  • While extensively studied with fMRI, its neural correlates using EEG, particularly event-related potentials (ERPs), are less understood.
  • Investigating ERP markers of subsequent memory effects in relation to self-referencing is crucial for understanding memory encoding.

Purpose of the Study:

  • To investigate how self-referencing modulates ERP markers of the subsequent memory effect.
  • To determine if ERP components reflecting memory success are impacted by self-referencing or if unique components are modulated.
  • To explore the neural underpinnings of the SRE using high temporal resolution EEG.

Main Methods:

  • Two experiments were conducted involving participants evaluating adjective self-relevance.
  • EEG data were recorded during adjective evaluation and a subsequent surprise recognition memory test.
  • Event-related potentials (ERPs) were analyzed to identify differences related to self-relevance and memory success.

Main Results:

  • A significant main effect of self-relevance was observed, manifesting as a late positivity at right frontal electrodes.
  • A similar frontal positivity was found when comparing subsequently remembered words to forgotten words.
  • Crucially, no interaction was detected between self-relevance and subsequent memory, indicating the effect is not exclusive to the SRE.

Conclusions:

  • The observed frontal positivity reflects a deeper encoding process, not solely the self-reference effect.
  • Self-referencing elicits this deeper encoding, but it is also engaged by other encoding strategies leading to successful memory.
  • This ERP component may serve as a general neural marker for enhanced memory encoding, irrespective of self-relevance.