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    Effects of acoustic distortion and semantic context on event-related potentials to spoken words

    Aydelott, J. and Dick, Frederic and Mills, D.L. (2006) Effects of acoustic distortion and semantic context on event-related potentials to spoken words. Psychophysiology 43 (5), pp. 454-464. ISSN 0048-5772.

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    Abstract

    This study examined the neurophysiological effects of acoustic degradation on auditory semantic processing. Event‐related potentials were recorded to target words presented in a sentence context. Targets were semantically congruent or incongruent with the context, which was acoustically intact or low‐pass filtered. In unaltered contexts, N400 amplitude was significantly greater for incongruent than congruent words. Filtering significantly reduced this effect, even though participants were highly accurate in interpreting the degraded stimuli, as shown by an anomaly detection task. This reduction in the N400 effect appeared to be driven by decreased N400 amplitudes over posterior electrode sites for incongruent targets. These results demonstrate that acoustic degradation influences the neural response to words in context by reducing the availability of semantic information in on‐line sentence comprehension.

    Metadata

    Item Type: Article
    School: School of Science > Psychological Sciences
    Depositing User: Sarah Hall
    Date Deposited: 18 Nov 2019 13:29
    Last Modified: 18 Nov 2019 13:29
    URI: https://eprints.bbk.ac.uk/id/eprint/29990

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