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Behavioral and fMRI evidence that cognitive ability modulates the effect of semantic context on speech intelligibility |
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| Authors: | Zekveld Adriana A Rudner Mary Johnsrude Ingrid S Heslenfeld Dirk J Rönnberg Jerker |
| Affiliation: | a Department of Behavioural Sciences and Learning, Linköping University, SE-581 83 Linköping, Sweden b Linnaeus Centre HEAD, The Swedish Institute for Disability Research, Linköping University, SE-581 83 Linköping, Sweden c Audiology/ENT & EMGO+ Institute for Health and Care Research, VU University Medical Center, De Boelelaan 1118, 1081 HZ Amsterdam, The Netherlands d Department of Psychology, Queen’s University, Kingston, Humphrey Hall, 62 Arch Street, Ontario, Canada K7L 3N6 e Department of Psychology, VU University, Van der Boechorststraat 1, 1081 BT Amsterdam, The Netherlands |
| Abstract: | Text cues facilitate the perception of spoken sentences to which they are semantically related (Zekveld, Rudner, et al., 2011). In this study, semantically related and unrelated cues preceding sentences evoked more activation in middle temporal gyrus (MTG) and inferior frontal gyrus (IFG) than nonword cues, regardless of acoustic quality (speech in noise or speech in quiet). Larger verbal working memory (WM) capacity (reading span) was associated with greater intelligibility benefit obtained from related cues, with less speech-related activation in the left superior temporal gyrus and left anterior IFG, and with more activation in right medial frontal cortex for related versus unrelated cues. Better ability to comprehend masked text was associated with greater ability to disregard unrelated cues, and with more activation in left angular gyrus (AG). We conclude that individual differences in cognitive abilities are related to activation in a speech-sensitive network including left MTG, IFG and AG during cued speech perception. |
| Keywords: | fMRI Spoken sentence perception Text cues Working memory |
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