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Related Experiment Videos

Boston naming test discontinuation rule: rigorous versus lenient interpretations

T J Ferman1, R J Ivnik, J A Lucas

  • 1Mayo Clinic, Rochester, Minnesota.

Assessment
|May 23, 1998
PubMed
Summary

Two scoring methods for the Boston Naming Test (BNT) exist. Differences in scoring the BNT discontinuation rule significantly impact results, especially for Alzheimer's Disease patients.

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Area of Science:

  • Neuropsychological assessment
  • Cognitive testing
  • Geriatric neurology

Background:

  • The Boston Naming Test (BNT) is a widely used tool for assessing confrontational naming.
  • A key scoring rule, "six consecutive failures," has two distinct interpretations.
  • Variations in interpretation can affect BNT scores and subsequent clinical interpretations.

Purpose of the Study:

  • To investigate the impact of two different interpretations of the BNT "six consecutive failures" discontinuation rule on test scores.
  • To quantify score discrepancies in both normal elderly individuals and patients with Alzheimer's Disease (AD).

Main Methods:

  • Two scoring methods (rigorous and lenient) were applied to BNT protocols from 655 normal elderly individuals and 140 AD patients.
  • The rigorous method counts correct responses to phonemic cues as failures, while the lenient method does not.

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  • Discrepancies between the two scoring methods were analyzed across different age groups and diagnostic categories.

    • Main Results:

    • BNT scores changed in 3% of normal elderly participants and 31% of AD patients when using different scoring interpretations.
    • Score differences were more pronounced in AD patients (up to 10 points) compared to normal elderly individuals (up to 16 points).
    • In normal elderly individuals, score discrepancies were more common in those aged 80 and older.

    Conclusions:

    • The interpretation of the BNT "six consecutive failures" rule can lead to substantial score differences.
    • These scoring variations have a notable clinical impact, particularly in the assessment of Alzheimer's Disease.
    • Standardized scoring protocols are essential for accurate BNT interpretation in clinical and research settings.