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Misperception in sentences but not in words: Speech perception and the phonological buffer
Charlotte Jacquemot1, Emmanuel Dupoux, Odile Decouche
1INSERM U421 Equipe Neuropsychologie Interventionnelle, Creteil, and ENS, Paris, France.
Cognitive Neuropsychology
|November 5, 2010
Summary
Patients with working-memory deficits impacting the phonological buffer struggle with sentence comprehension. This phonological buffer impairment affects tasks requiring temporary storage of speech sounds for understanding complex sentences.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Linguistics
Background:
- Working memory is crucial for language processing.
- The phonological buffer temporarily stores auditory-verbal information.
- Impairments in these systems can lead to communication difficulties.
Purpose of the Study:
- To investigate the role of the phonological buffer in sentence comprehension.
- To examine working-memory deficits in aphasic patients.
- To understand how phonological storage limitations affect language processing.
Main Methods:
- Case studies of two aphasic patients.
- Phonological discrimination tasks with and without memory load.
- Assessment of sentence comprehension, including mispronunciation detection and minimal pair processing.
Main Results:
- Patients performed well on phonological tasks without memory demands.
- Performance significantly declined on tasks requiring maintenance of phonological information.
- Impairments were evident in detecting mispronunciations and comprehending sentences with minimal word pairs.
Conclusions:
- The phonological buffer is essential for real-time sentence perception.
- It supports the analysis of the speech stream by temporarily storing phonological input.
- This storage aids in resolving ambiguities and re-examining speech input for comprehension.
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