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Life Sciences

Doctoral Dissertations

Theses/Dissertations

2018

Aging

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Hearing And Seeing A Speaker: How Perceptual And Cognitive Factors Modulate The Dynamics Of Audiovisual Speech Perception, Elina Kaplan Oct 2018

Hearing And Seeing A Speaker: How Perceptual And Cognitive Factors Modulate The Dynamics Of Audiovisual Speech Perception, Elina Kaplan

Doctoral Dissertations

In face-to-face conversations, listeners process and combine speech information obtained from hearing and seeing the speaker talk. Audiovisual speech typically leads to more robust recognition of speech, as it provides more information for recognition but also as it helps listeners adjust to speaker idiosyncrasies. The goal of the current thesis was to examine how certain perceptual and cognitive factors modulate how listeners use visual speech to facilitate momentary speech perception and to adjust to a speaker’s idiosyncrasies. Results showed that (older) listeners’ sensitivity to cross-modal synchrony is related to the size of the audiovisual interactions during early perceptual processing. Furthermore, …


A Living Model For Obesity And Aging Research: Caenorhabditis Elegans, Peiyi Shen Mar 2018

A Living Model For Obesity And Aging Research: Caenorhabditis Elegans, Peiyi Shen

Doctoral Dissertations

Caenorhabditis elegans (C. elegans) is a free-living nematode that has been extensively utilized as an animal model for the research involving aging and neurodegenerative diseases, like Alzheimer and Parkinson, etc. Compared with the traditional animal models, this nematode possesses many benefits, such as small body size, short lifespan, complete sequenced genome and more than 65% of the genes associated with human diseases. All these characteristics enable this organism to be an ideal living system for obesity and aging studies. Piceatannol is a natural stilbene with many beneficial effects, such as anti-oxidative, anti-inflammatory, anti-atherogenic activities, however, its role on …