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Emotion impairs extrinsic source memory--An ERP study.

Xinrui Mao1, Yuqi You2, Wen Li2

  • 1Beijing Key Laboratory of Learning and Cognition, Department of Psychology, Capital Normal University, Beijing, China.

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|July 28, 2015
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Summary
This summary is machine-generated.

Emotion impairs extrinsic source memory, affecting both familiarity and recollection. This memory trade-off disrupts peripheral details while potentially enhancing central item recall, with arousal playing a key role.

Keywords:
ERPEmotionExtrinsic source memoryFamiliarityRecollection

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Area of Science:

  • Cognitive Neuroscience
  • Psychology
  • Memory Research

Background:

  • Understanding how emotion impacts memory is crucial, yet its specific effects on source memory remain debated.
  • Existing research highlights emotion's influence on item memory, but less is known about its modulation of source memory details.

Purpose of the Study:

  • To investigate the impact of emotion on extrinsic source memory and its underlying neural processes.
  • To examine how emotional arousal affects familiarity and recollection in source memory recall.

Main Methods:

  • Utilized an emotional extrinsic source memory paradigm with remember/know judgments.
  • Measured event-related potentials (ERPs), specifically the FN400 (familiarity) and LPC (recollection).
  • Manipulated extrinsic source via semantic prompts ('people' or 'scene') preceding study items.

Main Results:

  • Behavioral data showed impaired recollection-based extrinsic source memory for emotional (positive and negative) items compared to neutral.
  • ERP analyses revealed emotion-related interference in both familiarity (FN400) and recollection (LPC) for extrinsic sources.
  • Comparable memory impairment for positive and negative items suggested arousal, not valence, is critical.

Conclusions:

  • Emotion induces a memory trade-off, disrupting peripheral contextual details (extrinsic source memory) while potentially enhancing central item memory.
  • Both familiarity and recollection processes are impaired for emotional extrinsic source memories.
  • Arousal appears to be a key factor in emotion's modulation of memory processes, influencing automatic and elaborate memory functions.