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Cognitive Reconstruction of Reversed Speech in French
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In: http://csjarchive.cogsci.rpi.edu/Proceedings/2005/docs/p803.pdf
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| 2 |
Cognitive Reconstruction of Reversed Speech in French
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In: http://www.psych.unito.it/csc/cogsci05/frame/poster/1/f703-grataloup.pdf
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| 3 |
Cognitive Reconstruction of Reversed Speech in French
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In: http://www.ddl.ish-lyon.cnrs.fr/fulltext/Grataloup/Grataloup_2005_CogSci.pdf
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Abstract:
In the present study we explore the implication of high and low level mechanisms in degraded (time-reversed) speech comprehension in normal hearing subjects. In experiment 1 we compared the loss of intelligibility due to the increasing size of reversion windows in both words and pseudowords. Results showed that words are generally reconstructed better than pseudowords, suggesting the existence of a lexical benefit in degraded speech restoration. Moreover, there was greater variability between individuals when reconstructing pseudowords than words. In experiment 2, we demonstrated that this interindividual variability correlated with the subjects ’ medial olivocochlear bundle functionality. These experiments highlight the importance of low-level auditory mechanisms in degraded speech restoration. In a third experiment, we performed ERP recordings during an auditory sentence comprehension task in which sentences could contain partially reversed words. Results suggest that both an automatic auditory violation detection component, the mismatch negativity (MMN), and a subsequent negative frontal wave (N600) were present. Moreover, only this later wave was modulated by the size of the reversion. Together, these results put forward the existence of major interindividual variability in the capacity to reconstruct degraded speech, which correlates with the physiological properties of the auditory system. In addition, our results also suggest the existence of multiple higher-level strategies that can compensate on-line for the lack of information caused by speech degradation.
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Keyword:
Auditory ERP; High and low levels processes; Intelligibility; Medial OlivoCochlear Bundle; Reversed
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URL: http://www.ddl.ish-lyon.cnrs.fr/fulltext/Grataloup/Grataloup_2005_CogSci.pdf
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.212.4100
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