The effect of combined sensory and semantic components on audio–visual speech perception in older adults
- 1 School of Psychology, Trinity College Dublin, Dublin, Ireland
- 2 Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland
- 3 Department of Medical Gerontology, Trinity College Dublin, Dublin, Ireland
Previous studies have found that perception in older people benefits from multisensory over unisensory information. As normal speech recognition is affected by both the auditory input and the visual lip movements of the speaker, we investigated the efficiency of audio and visual integration in an older population by manipulating the relative reliability of the auditory and visual information in speech. We also investigated the role of the semantic context of the sentence to assess whether audio–visual integration is affected by top-down semantic processing. We presented participants with audio–visual sentences in which the visual component was either blurred or not blurred. We found that there was a greater cost in recall performance for semantically meaningless speech in the audio–visual ‘blur’ compared to audio–visual ‘no blur’ condition and this effect was specific to the older group. Our findings have implications for understanding how aging affects efficient multisensory integration for the perception of speech and suggests that multisensory inputs may benefit speech perception in older adults when the semantic content of the speech is unpredictable.
Keywords: speech perception, aging, multisensory, audio–visual, cross-modal, top-down, semantics
Citation: Maguinness C, Setti A, Burke KE, Kenny RA and Newell FN (2011) The effect of combined sensory and semantic components on audio–visual speech perception in older adults. Front. Ag. Neurosci. 3:19. doi: 10.3389/fnagi.2011.00019
Received: 07 November 2011; Accepted: 28 November 2011;
Published online: 22 December 2011.
Copyright: © 2011 Maguinness, Setti, Burke, Kenny and Newell. This is an open-access article distributed under the terms of the Creative Commons Attribution Non Commercial License, which permits non-commercial use, distribution, and reproduction in other forums, provided the original authors and source are credited.
*Correspondence: Fiona N. Newell, Institute of Neuroscience, Lloyd Building, Trinity College Dublin, Dublin 2, Ireland. e-mail: email@example.com