Social and Behavioral Sciences Commons^™

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, …

The Neural Correlates Of Stereotype Threat And The Stereotype Inoculation Model In Young Women, Chaia Flegenheimer

Doctoral Dissertations

A promising intervention technique for stereotype threat effects is the stereotype inoculation model (SIM), which utilizes in-group role models to counteract stereotype-induced pressures. However, it remains unclear how the SIM may impact neural mechanisms during stereotype threat, including negative feedback bias (increased attention to undesirable feedback). The following three studies aim to examine the behavioral (Study 1) and neural (Study 2) markers of ST in women and how these markers are influenced by the SIM (Study 3). In each study, participants completed a non-traditional math task (the approximate number task). In the first two studies, one group was told the …

A Hybrid Brain-Computer Interface Based On Motor Intention And Visual Working Memory, Ching-Chang Kuo

Doctoral Dissertations

Non-invasive electroencephalography (EEG) based brain-computer interface (BCI) is able to provide alternative means for people with disabilities to communicate with and control over external assistive devices. A hybrid BCI is designed and developed for following two types of system (control and monitor).

Our first goal is to create a signal decoding strategy that allows people with limited motor control to have more command over potential prosthetic devices. Eight healthy subjects were recruited to perform visual cues directed reaching tasks. Eye and motion artifacts were identified and removed to ensure that the subjects' visual fixation to the target locations would have …