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Articles 91 - 97 of 97

Full-Text Articles in Psychology

Measures Of Social Cognition In The Laboratory And Real World: Towards Temporal Dynamics Of Implicit Other-Regard, Danielle Tucci May 2012

Measures Of Social Cognition In The Laboratory And Real World: Towards Temporal Dynamics Of Implicit Other-Regard, Danielle Tucci

Scripps Senior Theses

Social cognition is a fundamental aspect of human experience that enables us to have relationships with and understanding of other people. Social relationships have been shown to mitigate cognitive decline in old age and benefit cognitive functioning, and the social interaction on which these relationships rely requires an extensive network of cognitive processes, and by extension neural systems, that have not, as of yet, been widely studied in older adults. Nor has the function of these systems been tied to social relationships in the real world. Here, I will compare self-reports of real-world quality and extent of social networks with …

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Modality-Specific And Modality-General Encoding Of Auditory And Visual Rhythms, Amanda Pasinski May 2012

Modality-Specific And Modality-General Encoding Of Auditory And Visual Rhythms, Amanda Pasinski

UNLV Theses, Dissertations, Professional Papers, and Capstones

The perception of timing information plays a large role in our everyday activities, yet we still do not accurately understand the mechanisms underlying these perceptions. Both modality-general and modality specific mechanisms have been suggested to account for perceptual timing. The use of a new auditory tempo perception paradigm can be used to examine various brain responses - measured via electroencephalography (EEG) - thought to index timing perception. This study applied this paradigm to both auditory and visual rhythms, and compared event-related potentials (ERPs) to task performance. Auditory and visual contingent negative variation (CNV) components showed two distinct voltage patterns across …

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Visual Attention, Color Processing And Physiological Measure Differences In Males And Females With Substance Abuse And Opiate Addiction, Jo Ann Petrie Mar 2012

Visual Attention, Color Processing And Physiological Measure Differences In Males And Females With Substance Abuse And Opiate Addiction, Jo Ann Petrie

Theses and Dissertations

A biological marker of the addictive state would be a major breakthrough in objectively assessing the efficacy of treatment outcomes. Given its role in the mesolimbic system and drug reward, most biological marker studies for addiction focus on measures related to dopamine (DA). Dopamine is also implicated in some disorders of visual attention and plays a modulatory role in the processing of color in the retinal DA pathway. For example, visual processing in the retina has been shown to co-vary with DA levels during cocaine withdrawal. In this electroencephalographic (EEG) study, we studied event related potentials (ERPs) and reaction time …

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Manipulating Paradigm And Attention Via A Mindfulness Meditation Training Program Improves P300-Based Bci., Daniel Ryan Berry Aug 2011

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 …

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The Neural Correlates Of Retrospective Memory Monitoring: Convergent Findings From Erp And Fmri, Jeremy Clark Roper Jul 2011

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, …

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Replacing Indirect Manual Assistive Solutions With Hands-Free, Direct Selection, James W. Leonard Jr. Jan 2011

Replacing Indirect Manual Assistive Solutions With Hands-Free, Direct Selection, James W. Leonard Jr.

Browse all Theses and Dissertations

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 …

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The Relationships Among Age, Physical Activity, And Working Memory, Ellen M. Carpenter Jan 2008

The Relationships Among Age, Physical Activity, And Working Memory, Ellen M. Carpenter

Psychology Theses & Dissertations

As our population ages, determining exogenous factors that may offset cognitive decline become increasingly important. The primary goal of the present study was to determine whether older individuals who engage in regular physical activity demonstrate superior working memory performance relative to older sedentary individuals. Forty young (20 active, 20 sedentary) and forty older (20 active, 20 sedentary) individuals engaged in cognitive measures of information processing speed, inhibitory function, and verbal and visuospatial working memory. Age differences in recall were found for verbal and visuospatial span tasks, as well as for recall reaction time on verbal and visuospatial n-back tasks, and …

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