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Related Experiment Videos

Disorder in sequential speech perception: a case study on pure word deafness.

S Nakakoshi1, M Kashino, A Mizobuchi

  • 1Tokyo Metropolitan Okubo Hospital, Japan. CZQ04340@niftyserve.or.jp

Brain and Language
|March 20, 2001
PubMed
Summary

Brain damage can impair speech perception, causing a "negative recency effect" where recent syllables are harder to recall. This impacts auditory processing and memory load for speech sound sequences.

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Area of Science:

  • Neuroscience
  • Psycholinguistics
  • Cognitive Psychology

Background:

  • Investigating the specific effects of brain damage on auditory speech perception.
  • Understanding the mechanisms underlying speech sequence processing and recall.

Observation:

  • A patient exhibited unique deficits in perceiving syllable sequences post-brain injury.
  • Experiments revealed a "negative recency effect," characterized by poor repetition of later syllables in a sequence.

Findings:

  • The "negative recency effect" in speech perception stems from slowed speech sound processing.
  • Memory load from processing preceding syllables hinders subsequent phonological coding.
  • These memory-holding processes are modality-nonspecific, affecting auditory processing.

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Implications:

  • Highlights the complex relationship between brain function, speech perception, and memory.
  • Suggests potential targets for therapeutic interventions in speech processing disorders.
  • Informs models of auditory working memory and phonological processing.