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Acute stress enhances general-knowledge semantic memory.

Amy M Smith1, Gregory I Hughes2, F Caroline Davis3

  • 1The Center for Applied Brain and Cognitive Sciences, Tufts University, 200 Boston Ave., Suite 3000, Medford, MA 02155, United States of America.

Hormones and Behavior
|February 12, 2019
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Summary
This summary is machine-generated.

Acute psychological stress enhances semantic memory retrieval, improving general knowledge recall. This contrasts with stress impairing episodic memory, suggesting differential effects on memory systems.

Keywords:
CortisolRetrievalSemantic memoryStress

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Area of Science:

  • Neuroscience
  • Psychology
  • Cognitive Science

Background:

  • Acute psychological stress impairs episodic memory (context-dependent events).
  • The effect of stress on semantic memory (context-independent general knowledge) remains unclear.
  • Existing research primarily focuses on stress's negative impact on memory.

Purpose of the Study:

  • To investigate the influence of acute psychological stress on semantic memory retrieval.
  • To determine if stress differentially affects episodic versus semantic memory.
  • To explore the relationship between cortisol reactivity and semantic memory performance.

Main Methods:

  • Participants underwent either a stress induction or a control task.
  • Semantic memory was assessed using a trivia test.
  • Cortisol levels were measured to assess stress reactivity.

Main Results:

  • Stress significantly enhanced semantic memory retrieval compared to the control group.
  • Higher cortisol reactivity to stress correlated with better trivia test performance.
  • Findings contrast with established effects of stress on episodic memory.

Conclusions:

  • Acute psychological stress can enhance, rather than impair, semantic memory retrieval.
  • Stress-induced memory effects appear to depend on the memory system involved (episodic vs. semantic).
  • Differential effects suggest distinct neural pathway involvement (medial-temporal, neocortical, striatal regions).