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Does reactivation trigger episodic memory change? A meta-analysis.

Iiona D Scully1, Lucy E Napper1, Almut Hupbach1

  • 1Department of Psychology, Lehigh University, USA.

Neurobiology of Learning and Memory
|December 28, 2016
PubMed
Summary
This summary is machine-generated.

Memory reactivation makes long-term episodic memories vulnerable to interference and change. This study confirms that reactivated memories can be altered by new information or interference, supporting a dynamic memory system.

Keywords:
Episodic memoryMemory reactivationReconsolidation

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • The reconsolidation hypothesis posits that reactivated long-term memories enter a labile state.
  • This plasticity renders memories susceptible to modification and potential loss without re-storage.

Purpose of the Study:

  • To meta-analytically evaluate evidence for reactivation-induced changes in human episodic memory.
  • To investigate the impact of interference on reactivated memories.

Main Methods:

  • Meta-analysis of studies examining human episodic memory.
  • Analysis of interference effects (physiological and behavioral) following memory reactivation.

Main Results:

  • Memory reactivation increases susceptibility to interference.
  • Interference manipulations post-reactivation alter memory retrieval, particularly for remote and narrative memories.
  • New learning after reactivation leads to increased intrusions into original memories.

Conclusions:

  • Findings support the dynamic nature of long-term memory.
  • Memories remain malleable and subject to change long after initial encoding.