Delayed detection of tonal targets in background noise in dyslexia
| Autor: | Maria Chait, Deborah F. Hill, Jonathan Z. Simon, D. Lynn Flowers, David Poeppel, Guinevere F. Eden |
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| Rok vydání: | 2007 |
| Předmět: |
Adult
Male Sound localization Linguistics and Language medicine.medical_specialty Cognitive Neuroscience Experimental and Cognitive Psychology Sensory system Stimulus (physiology) Audiology behavioral disciplines and activities Language and Linguistics Dyslexia Pitch Discrimination Speech and Hearing Communication disorder medicine Humans Language disorder Communication business.industry Auditory Perceptual Disorders medicine.disease Acoustic Stimulation Female Percept Noise business Psychology Binaural recording psychological phenomena and processes |
| Zdroj: | Brain and Language. 102:80-90 |
| ISSN: | 0093-934X |
| DOI: | 10.1016/j.bandl.2006.07.001 |
| Popis: | Individuals with developmental dyslexia are often impaired in their ability to process certain linguistic and even basic non-linguistic auditory signals. Recent investigations report conflicting findings regarding impaired low-level binaural detection mechanisms associated with dyslexia. Binaural impairment has been hypothesized to stem from a general low-level processing disorder for temporally fine sensory stimuli. Here we use a new behavioral paradigm to address this issue. We compared the response times of dyslexic listeners and their matched controls in a tone-in-noise detection task. The tonal signals were either Huggins Pitch (HP), a stimulus requiring binaural processing to elicit a pitch percept, or a pure tone-perceptually similar but physically very different signals. The results showed no difference between the two groups specific to the processing of HP and thus no evidence for a binaural impairment in dyslexia. However, dyslexic subjects exhibited a general difficulty in extracting tonal objects from background noise, manifested by a globally delayed detection speed. |
| Databáze: | OpenAIRE |
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