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Manipulating Paradigm And Attention Via A Mindfulness Meditation Training Program Improves P300-Based Bci., Daniel Ryan Berry
Manipulating Paradigm And Attention Via A Mindfulness Meditation Training Program Improves P300-Based Bci., Daniel Ryan Berry
Electronic Theses and Dissertations
To date, only one study has situationally bolstered attentional resources in an effort to improve P300-BCI performance. The current study implements a 4-week Mindfulness Meditation Training Program (MMTP) as a nonmedicinal means to increase concentrative attention and to reduce lapses of attention; MMTP is expected to improve P300-BCI performance by enhancing attentional resources and reducing distractibility. A second aim is to test the efficacy of the checkerboard paradigm (CBP) against the standard row-column paradigm (RCP). Online results show that MMTP had greater accuracies than CTRL and that CBP outperformed the RCP. MMTP participants provided greater amplitude positive target responses, but …
The Neural Correlates Of Retrospective Memory Monitoring: Convergent Findings From Erp And Fmri, Jeremy Clark Roper
The Neural Correlates Of Retrospective Memory Monitoring: Convergent Findings From Erp And Fmri, Jeremy Clark Roper
Theses and Dissertations
Monitoring the accuracy of memory is an automatic but essential process of memory encoding and retrieval. Retrospective memory confidence judgments are making effective and efficient decisions based on one's memories. The neural processes involved in retrospective confidence ratings were investigated with EEG and fMRI using a recognition memory task designed such that participants also rated their confidence in their memory response. Correct trials (hits and correct rejections) were examined for differences related to the participants' level of confidence in their response. There were significant differences in electrophysiological activity (in the FN400 and the late parietal component) associated with confidence rating, …
Replacing Indirect Manual Assistive Solutions With Hands-Free, Direct Selection, James W. Leonard Jr.
Replacing Indirect Manual Assistive Solutions With Hands-Free, Direct Selection, James W. Leonard Jr.
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Case study BK is a teenage male who suffers from severe cerebral palsy, making communication very difficult using his current assistive technology. His performance with a manual switch was compared to a hands-free system for computer interaction (Cyberlink Brainfingers/ NIA). BK uses a switch scanning menu, which steps through predetermined options till he chooses the current option being read aloud by pressing a button. A yes/no menu was used for the switch scanning interface for both manual and hands free conditions, as well as the point and click condition. In both hands-free conditions, BK was as fast and accurate as …