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4. The influence of visual information on the perception of auditory speech in quiet and noise

Author

Stacey, Jemaine E.

Subjects
612.8
Abstract

Audio-visual (AV) integration involves the combining of auditory and visual information which is often required for everyday face to face communication. Speech perception becomes difficult in situations when it is harder to hear the voice of the speaker. When the ability to identify speech in noise is reduced, people with normal hearing improve with the addition of visual information; when they can see the talker's face (Sumby & Pollack, 1954). Exactly how visual information is used in background noise is not well understood. The goal of the thesis was to understand the influence of visual information on auditory speech perception using a famous measure of AV integration (The McGurk effect). Four experiments are reported which aimed to a) explore the use of the McGurk effect as a measure of AV integration, b) understand the influence of visual information in quiet and noise, and how auditory and visual information interact when one or both of the modalities is degraded, and c) provide insight into theories of AV integration through using behavioural measures. The main findings were that 1) instances of the McGurk effect are influenced by the type of task used, and vary according to different stimuli and participants, 2) The McGurk effect can still be perceived even when the visual stimulus is highly degraded although the illusion decreases as visual blur increases, 3) fixating the mouth is not necessary for perceiving the McGurk effect, 4) Visual benefit increases as the clarity of the visual stimulus increases. Overall, the findings suggest that visual information is of most benefit when it is clear, looking at the mouth is not necessary for AV integration in quiet but increases the likelihood of successful integration when speech is presented in auditory noise.

Published
2019

9. Relationship between self-reported listening and communication difficulties and executive function: a protocol for a systematic review and meta-analysis

Author

Stacey, Jemaine E, Danielsson, Henrik, Heinrich, Antje, Batinović, Lucija, Holmer, Emil, Ingo, Elisabeth, Henshaw, Helen, Stacey, Jemaine E, Danielsson, Henrik, Heinrich, Antje, Batinović, Lucija, Holmer, Emil, Ingo, Elisabeth, and Henshaw, Helen

Abstract

Introduction Listening and communication difficulties can limit people’s participation in activity and adversely affect their quality of life. Hearing, as well as listening and communication difficulties, can be measured either by using behavioural tests or self-report measures, and the outcomes are not always closely linked. The association between behaviourally measured and self-reported hearing is strong, whereas the association between behavioural and self-reported measures of listening and communication difficulties is much weaker, suggesting they assess different aspects of listening. While behavioural measures of listening and communication difficulties have been associated with poorer cognitive performance including executive functions, the same association has not always been shown for self-report measures. The objective of this systematic review and meta-analysis is to understand the relationship between executive function and self-reported listening and communication difficulties in adults with hearing loss, and where possible, potential covariates of age and pure-tone audiometric thresholds. Methods and analysis Studies will be eligible for inclusion if they report data from both a self-report measure of listening difficulties and a behavioural measure of executive function. Eight databases are to be searched: MEDLINE (via Ovid SP), EMBASE (via Ovid SP), PsycINFO (via Ovid SP), ASSIA (via ProQuest), Cumulative Index to Nursing and Allied Health Literature or CINAHL (via EBSCO Host), Scopus, PubMed and Web of Science (Science and Social Science Citation Index). The JBI critical appraisal tool will be used to assess risk of bias for included studies. Results will be synthesised primarily using a meta-analysis, and where sufficient quantitative data are not available, a narrative synthesis will be carried out to describe key results. Ethics and dissemination No ethical issues are foreseen. Data will be disseminated via academic publication and conference pr, Funding: National Institute for Health and Care Research (NIHR) [CDF- 2018- 11- ST2- 016, PB- PG- 0816- 20044]; NIHR Nottingham Biomedical Research Centre [NIHR 203310]; NIHR Manchester Biomedical Research Centre [NIHR 203308]; Swedish Research Council [2017- 06092]

Published
2023
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