Modality-Specific Training in Audio-Visual Speech Integration

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2012-06

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The Ohio State University

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Abstract

Listeners integrate auditory and visual signals to understand speech in both compromised and normal listening environments. This integration appears to be a process independent of the ability to process auditory-only or visual- only speech cues (Grant & Seitz, 1998). Training with auditory-only stimuli does not seem to generalize to the audio-visual condition (James, 2009); nor does audio-visual training produce improvements in auditory-only perception. Because skill in all three modalities is important in speech perception by hearing impaired persons, the question remains whether audio-visual integration would improve if training in all three modalities were provided. In the present study, five listeners received ten training sessions that included auditory-only, visual-only and audio-visual stimuli. The auditory component of these speech stimuli was degraded in a similar method to Shannon et al. (1995). Results showed that subjects improved in all conditions; however, different measures of audio-visual integration yielded conflicting indications of integration improvement. These results suggest that stimulus selection plays an important role in training to improve audio-visual integration in aural rehabilitation programs.

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speech perception, audio-visual, aural rehabilitation

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