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Online Repetitive Transcranial Magnetic Stimulation of Dorsomedial and Dorsolateral Prefrontal Cortex in Cognition Decision Making, and Cognitive Dissonance
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Cognitive dissonance resolution depends on episodic memory.

Mariam Chammat1,2, Imen El Karoui1,2, Sébastien Allali1,2

  • 1INSERM, U 1127, F-75013, Paris, France.

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Summary
This summary is machine-generated.

Choice-induced preference change requires conscious memory of past decisions. This cognitive dissonance effect is absent for forgotten items, highlighting memory's role in maintaining subjective coherence.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Social Psychology

Background:

  • Past choices influencing current preferences is a key concept in social psychology, theorized within cognitive dissonance.
  • The free-choice paradigm (FCP) shows individuals reevaluating chosen items more favorably post-decision.
  • The relationship between episodic memory and choice-induced preference change (CIPC) has been debated.

Purpose of the Study:

  • To resolve the debate on whether CIPC depends on memory of past choices.
  • To investigate the neural mechanisms underlying CIPC.
  • To examine CIPC in amnesic patients to confirm the role of conscious memory.

Main Methods:

  • Utilized functional magnetic resonance imaging (fMRI) and intra-cranial electrophysiological recordings.
  • Employed the free-choice paradigm (FCP).
  • Tested amnesic patients with forgotten items.

Main Results:

  • CIPC occurs exclusively for items correctly remembered from the choice stage.
  • Modulation of left hippocampus activity, crucial for episodic memory retrieval, was observed before CIPC.
  • CIPC was absent in amnesic patients for items they did not remember choosing or rejecting.

Conclusions:

  • Cognitive dissonance is dependent on conscious episodic memory.
  • This finding resolves the theoretical debate regarding memory's role in CIPC.
  • The link between choices and preferences suggests a homeostatic function for maintaining subjective coherence.