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Using a Classroom-Based Deese Roediger McDermott Paradigm to Assess the Effects of Imagery on False Memories
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False memories for shape activate the lateral occipital complex.

Jessica M Karanian1, Scott D Slotnick1

  • 1Department of Psychology, Boston College, Chestnut Hill, Massachusetts 02467, USA.

Learning & Memory (Cold Spring Harbor, N.Y.)
|September 17, 2017
PubMed
Summary
This summary is machine-generated.

False memories for shape involve lower-level brain regions like the lateral occipital complex (LOC), challenging previous findings that linked them only to higher-level processing. This suggests sensory processing areas contribute to memory distortions.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Memory Research

Background:

  • Previous functional magnetic resonance imaging (fMRI) studies suggested that false memories originate from higher-level conscious processing regions.
  • These studies indicated that lower-level sensory processing regions were not significantly involved in the formation of false memories.
  • The role of specific lower-level visual processing areas, such as the lateral occipital complex (LOC), in false memory formation remained unclear.

Purpose of the Study:

  • To investigate whether the lateral occipital complex (LOC), a region involved in lower-level shape processing, is associated with false memories for shape.
  • To determine if sensory processing regions contribute to the neural mechanisms underlying shape-based false memories.

Main Methods:

  • Participants viewed intact or scrambled colored abstract shapes during an encoding phase.
  • During retrieval, participants were presented with colored disks and asked to identify whether the original item was intact or scrambled.
  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity during the memory retrieval task.

Main Results:

  • The study observed increased activation in the LOC during the formation of false memories for shape (i.e., when participants incorrectly identified a scrambled shape as intact).
  • This activation pattern, specifically 'intact'/scrambled compared to 'scrambled'/scrambled, suggests a role for the LOC in generating these specific false memories.
  • The findings indicate that lower-level sensory processing regions can indeed support the occurrence of false memories.

Conclusions:

  • The lateral occipital complex (LOC), a lower-level shape processing region, is implicated in the neural basis of false memories for shape.
  • These findings challenge the prevailing view that false memories exclusively arise from higher-level cognitive processes.
  • The study demonstrates that sensory processing areas can contribute to memory distortions, expanding our understanding of memory's neural architecture.