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Related Experiment Videos

Aging and Language Production.

Deborah M Burke1, Meredith A Shafto

  • 1Pomona College, Oxford, England.

Current Directions in Psychological Science
|April 17, 2008
PubMed
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Cognitive aging impairs spoken word retrieval and spelling in older adults due to weakened neural connections. This affects accessing word sounds and spellings, impacting language production.

Area of Science:

  • Cognitive psychology
  • Neuroscience of aging
  • Linguistics

Background:

  • Aging is associated with declines in spoken word production, particularly word-finding difficulties like tip-of-the-tongue states.
  • These speech production failures in older adults are linked to challenges in retrieving the phonological (sound) forms of words.
  • Emerging evidence indicates a similar age-related decline in retrieving the orthographic (spelling) forms of familiar words.

Purpose of the Study:

  • To explain why phonological and orthographic retrieval decline with age while semantic processes remain intact.
  • To propose a cognitive model that accounts for age-related deficits in language production.
  • To identify the mechanisms underlying retrieval failures in older adults.

Main Methods:

Related Experiment Videos

  • Review of experimental research on aging and word production.
  • Analysis of older adults' self-reported experiences with word retrieval.
  • Development of a computational model of cognitive aging and language retrieval.

    • Main Results:

    • A proposed model suggests that aging weakens connections between linguistic representations.
    • This weakening reduces neural transmission efficiency, particularly affecting phonological and orthographic systems.
    • The structural properties of word sound and spelling systems make them vulnerable to these age-related transmission deficits.

    Conclusions:

    • Age-related declines in spoken word production and spelling stem from impaired retrieval of linguistic forms.
    • Weakened neural connections due to aging are the primary mechanism behind these retrieval difficulties.
    • The model provides a framework for understanding preserved semantic abilities alongside declining phonological and orthographic retrieval in aging.