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Updated: Feb 17, 2026

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment
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Subclinical naming errors in mild cognitive impairment: A semantic deficit?

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Patients with mild cognitive impairment (MCI) show impaired semantic processing during naming tasks. This suggests semantic memory deficits are an early indicator in the progression to Alzheimer's disease (AD).

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Area of Science:

  • Neuropsychology
  • Cognitive Neurology
  • Alzheimer's Disease Research

Background:

  • Mild cognitive impairment (MCI) represents a transitional phase between normal aging and Alzheimer's disease (AD).
  • Semantic memory impairments are recognized as a critical early factor in the development of AD.
  • The Boston Naming Test (BNT) assesses semantic and visuo-perceptual functions, offering diagnostic potential.

Purpose of the Study:

  • To investigate naming abilities in individuals with amnestic mild cognitive impairment (aMCI).
  • To identify and classify specific error types during naming tasks in the aMCI population.

Main Methods:

  • Evaluated 20 aMCI patients, 20 AD patients, and 21 healthy controls, matched for age, sex, and education.
  • Administered the Boston Naming Test (BNT) as part of a comprehensive neuropsychological assessment.
  • Developed a detailed error classification system to differentiate semantic from perceptual errors.

Main Results:

  • Alzheimer's disease patients exhibited significantly lower overall BNT scores compared to both aMCI patients and controls.
  • No significant difference in total BNT scores was observed between aMCI patients and controls.
  • aMCI patients demonstrated a significantly higher frequency of semantic errors than control participants.

Conclusions:

  • Semantic processing deficits are evident in individuals with amnestic mild cognitive impairment during confrontation naming.
  • The findings highlight semantic memory impairment as a key characteristic of aMCI.