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  • Title: The independence of working memory capacity and audiovisual cues when listening in noise.
    Author: Michalek AMP, Ash I, Schwartz K.
    Journal: Scand J Psychol; 2018 Dec; 59(6):578-585. PubMed ID: 30180277.
    Abstract:
    This study examined the effect of levels of working memory capacity, levels of background noise, and audiovisual cues on adults' ability to process speech when listening in noise. A mixed design was used to examine the effects of signal-to-noise ratio (SNR, 6 levels), audiovisual condition (audio vs. audiovisual), and working memory capacity on speech recognition. Ninety-six participants between the ages of 18 35 without a history of hearing loss or cognitive impairment were recruited for this research project. Working memory capacity mediated speech processing in noise during the auditory only listening condition. The reliance on working memory capacity increased as noise level increased. There was no interaction effect between working memory capacity and the audiovisual listening condition. People with a high working memory capacity have an advantage when listening to speech in noisy backgrounds. The level of the noise makes the biggest difference in a person's ability to recognize speech and performance can be improved with the inclusion of audiovisual cues. The effects of low signal-to-noise ratios can be mitigated with audiovisual cues independent of attentional control mechanisms.
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