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Phonological processing and lexical access in aphasia.

W Milberg1, S Blumstein, B Dworetzky

  • 1Aphasia Research Center, VA Medical Center, Boston, Massachusetts.

Brain and Language
|July 1, 1988
PubMed
Summary
This summary is machine-generated.

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This study investigated how aphasic patients process sounds for word recognition. Results show that fluent aphasics maintain sound processing for word access, unlike nonfluent aphasics.

Area of Science:

  • Neuroscience
  • Psycholinguistics
  • Speech and Language Pathology

Background:

  • Lexical access involves retrieving word meaning from memory.
  • Phonological processing is crucial for understanding spoken language.
  • Aphasia can impair language processing abilities.

Purpose of the Study:

  • To examine the relationship between on-line phonological processing and lexical access in aphasic patients.
  • To investigate how varying degrees of phonological distortion affect lexical decision tasks in aphasia.
  • To differentiate between deficits in lexical access versus lexical or phonological organization in aphasia.

Main Methods:

  • Auditory lexical decision paradigm with word and nonword stimuli.
  • Priming with semantically related words, with systematic phonological feature changes in primes.

Related Experiment Videos

  • Comparison of priming effects across different phonological distortion levels and patient groups (fluent aphasics, nonfluent aphasics).

    • Main Results:

    • Normal listeners show decreasing facilitation with increasing phonological distortion.
    • Fluent aphasics exhibited priming across all phonological distortion levels.
    • Nonfluent aphasics only showed priming with undistorted, related words.
    • All aphasic groups demonstrated phonological feature sensitivity in a secondary nonword task.

    Conclusions:

    • Aphasic patients may have deficits in the processes contributing to lexical access.
    • Impairments appear to be in the online processing of phonological information rather than in lexical or phonological organization itself.
    • Findings highlight distinct phonological processing profiles in fluent versus nonfluent aphasia.