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Related Experiment Videos

Mis-attribution errors in Alzheimer's disease: the illusory truth effect.

Jason P Mitchell1, Alison L Sullivan, Daniel L Schacter

  • 1Harvard University, Cambridge, MA 02138, USA. jmitchel@wjh.harvard.edu

Neuropsychology
|April 6, 2006
PubMed
Summary

Patients with Alzheimer's disease (AD) show altered memory misattribution. AD patients made fewer errors when relying on familiarity but more errors when recollection was needed, clarifying memory deficits in early Alzheimer's disease.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Gerontology

Background:

  • Alzheimer's disease (AD) is a neurodegenerative disorder impacting memory.
  • Memory errors, particularly misattribution, are a key feature of cognitive decline.
  • The illusory truth effect, where familiarity leads to judging information as true, is a relevant measure of misattribution.

Purpose of the Study:

  • To investigate memory misattribution errors in patients with mild Alzheimer's disease (AD).
  • To differentiate the roles of familiarity and recollection in memory errors in AD.
  • To clarify the specific nature of memory impairments in early-stage Alzheimer's disease.

Main Methods:

  • Comparison of mild Alzheimer's disease patients and age-matched controls on memory tasks.

Related Experiment Videos

  • Measurement of misattribution errors using the illusory truth effect under cued and uncued conditions.
  • Assessment of familiarity and recollection contributions to memory judgments.

    • Main Results:

    • Alzheimer's disease patients exhibited fewer misattribution errors in the uncued condition (familiarity-based).
    • Alzheimer's disease patients exhibited more misattribution errors in the cued condition (recollection-based).
    • Findings suggest differential impacts of AD on familiarity and recollection processes.

    Conclusions:

    • Alzheimer's disease impairs memory attribution, affecting both familiarity and recollection.
    • The study provides specific insights into the memory deficits characteristic of early Alzheimer's disease.
    • Results contribute to understanding the cognitive consequences of Alzheimer's disease progression.