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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 …
Does Crowding Obscure The Presence Of Attentional Guidance In Contextual Cueing?, Steven William Fiske
Does Crowding Obscure The Presence Of Attentional Guidance In Contextual Cueing?, Steven William Fiske
USF Tampa Graduate Theses and Dissertations
The contextual cueing effect was initially thought to be the product of memory guiding attention to the target location. However, the steep search slopes obtained in contextual cueing indicate an absence of attentional guidance. We hypothesized that crowding could be obscuring the presence of attentional guidance and investigated this possibility in 2 experiments. Crowding was manipulated by varying the density of items in the local target region in a contextual cueing task. We observed a significant reduction in search slopes between the novel and repeated conditions when crowding was reduced. Enhancing crowding eliminated the contextual cueing effect. These findings suggest …
Relationships Among Processing Speed, Attention, And Biochemical Features In Children Identified With Mitochondrial Disease, Jihye S. Chang
Relationships Among Processing Speed, Attention, And Biochemical Features In Children Identified With Mitochondrial Disease, Jihye S. Chang
Psychology Theses
Mitochondrial Diseases (MD) are disorders of function in cellular oxidative phosphorylation caused by diverse nuclear DNA and mtDNA mutations and seen in 1/5,000 births. The purpose of this study was to examine relationships across medical indices, biochemical measures, and neurobehavioral functioning in children with MD. Findings from Western Blot, Native Gels, High Resolution Respirometry, and the Nijmegen diagnostic criteria were assessed in relation to children’s processing speed and attention, based on the prediction that impaired functioning of proteins, complexes, and cellular respiration, that are critical in ATP production, will impact neurodevelopment and related neuropsychological processes in children with MD. Twenty-five …
Hemispheric Asymmetry Of The Affective Priming Effect, David R. Herring
Hemispheric Asymmetry Of The Affective Priming Effect, David R. Herring
Open Access Theses & Dissertations
The present study examined the role of prime strength on the lateralized affective priming effect. Participants were presented unilateral primes (i.e., either to the left or right visual field) and then made evaluative decisions on centrally presented targets. Across both experiments, the affective congruity effect occurred for high, but not low, arousing primes. In Experiment 1, when stimuli were primes or targets but not both, the affective priming effect occurred in the right visual field (left hemisphere) for high arousing primes. However in Experiment 2, when stimuli were presented as both primes and targets receiving repeated parafoveal and foveal exposure …
The Role Of Perceptual Processes In The Use Of And Willingness To Use Professional Health Care Services, Luis Omar Rivera
The Role Of Perceptual Processes In The Use Of And Willingness To Use Professional Health Care Services, Luis Omar Rivera
Open Access Theses & Dissertations
To better address ethnic health disparities, it is imperative that we understand the psychological processes that shape people's use of and willingness to use professional health care services. The current research proposes and tests a model in which people's attentional orientation toward context discourages them from seeking professional health care services because (a) attentional orientation toward context encourages people to attribute symptoms of illness to external/environmental factors and (b) attributing symptoms of illness to external/environmental factors is associated with less use of professional health care services. The results of two studies show mixed support for the proposed model. Consistent with …
Assessing Attentional Bias And Cerebral Laterality In Specific Phobia Using A Dichotic Listening Paradigm, Whitney Shay Jenkins
Assessing Attentional Bias And Cerebral Laterality In Specific Phobia Using A Dichotic Listening Paradigm, Whitney Shay Jenkins
LSU Master's Theses
Researchers have found fear to impact a variety of cognitive variables in individuals with specific phobia. Attentional bias is a cognitive variable that has received considerable attention in the specific phobia literature; however, the existing literature follows only one line of attentional bias—bias as encoded through images, words, or other content presented visually. This study aimed to expand on this area by assessing attention and cerebral laterality in individuals with specific phobia using a dichotic listening paradigm (i.e., via auditory means). Results indicated that participants with specific phobias do not significantly differ from controls in terms of the number of …
The Differential Effects Of Genetic And Dietary Alterations In Folate Status On Prefrontal Cortical Functions, Jessica Amanda Ash
The Differential Effects Of Genetic And Dietary Alterations In Folate Status On Prefrontal Cortical Functions, Jessica Amanda Ash
Legacy Theses & Dissertations (2009 - 2024)
Folate status plays an essential role in embryogenesis and brain development; however, its importance in supporting cognitive functioning throughout adulthood is less clear. The present study was interested in examining the effects of genetic and dietary alterations in folate status on prefrontal cortical functions in mice, modeling a common polymorphism in the MTHFD1 gene in folate metabolism. A factorial design was used crossing two genotypes (mice with a gene trap insertion in the Mthfd1 gene exhibiting 50% decreased Mthfd1 expression: Mthfd1gt/+ mice or wildtype mice) with two levels of dietary folate (folate sufficient or folate deficient). The mice were tested …
Pcbs And Measures Of Attention And Impulsivity On A Continuous Performance Task Of Young Mohawk Adults, Bita Behforooz
Pcbs And Measures Of Attention And Impulsivity On A Continuous Performance Task Of Young Mohawk Adults, Bita Behforooz
Legacy Theses & Dissertations (2009 - 2024)
Past animal and human studies have shown that exposure to PCBs can result in a wide range of negative toxic effects. However, only a few studies have investigated the relationship between PCB exposure and attention and impulsivity. The present study examined the relationship between current body burden levels of PCBs and attention and impulsivity in young adults ages 17 to 21 from the Mohawk Nation of Akwesasne. The community is concerned because PCBs from industrial effluent have contaminated the local ecology and entered the Mohawk's food chain. Attention and impulsivity were measured by errors of omission and errors of commission …
The Role Of Task-Appropriate Processing, Context, And Attention Allocation In Prospective Memory: A Multinomial Modeling Approach, Benjamin Anderson Martin, Ii
The Role Of Task-Appropriate Processing, Context, And Attention Allocation In Prospective Memory: A Multinomial Modeling Approach, Benjamin Anderson Martin, Ii
LSU Doctoral Dissertations
This study investigated the influences of attention and retrospective memory processes on prospective memory. In Experiment 1, participants who processed prospective memory cues under conditions that did not coincide with the processes required for making judgments in an ongoing task showed greater levels of performance at the expense of the attentional resources needed to complete the ongoing task. This differed compared to participants who processed cues under conditions that required the same processes needed to performance the ongoing task. In Experiment 2, the reinstatement of contextual features associated with prospective memory cues from the time of intention formation, or encoding, …
The Role Of Contextual Associations In The Selection Of Objects, Noah Patrick Sulman
The Role Of Contextual Associations In The Selection Of Objects, Noah Patrick Sulman
USF Tampa Graduate Theses and Dissertations
This paper describes a sequence of experiments addressing basic questions about the control of visual attention and the relationship between attention and object recognition. This work reviews compelling findings addressing attentional control on the basis of high-level perceptual properties. In five experiments observers were presented with a rapid sequence of object photographs and instructed to either detect or selectively encode a verbally cued object category. When these object categories (e.g. "baseball") were preceded by contextual images associated with a given object category (e.g. "baseball diamond"), observers were less likely to accurately report information about the target item. This effect obtained …
Visual Search For Smoking Stimuli: Detection And Distraction, Jason A. Oliver
Visual Search For Smoking Stimuli: Detection And Distraction, Jason A. Oliver
USF Tampa Graduate Theses and Dissertations
Extensive research has shown that the attentional systems of addicted individuals are biased towards drug-related stimuli, but despite several decades of effort these results have frequently been inconsistent. Though commonly believed to result from addiction and dependence, cognitive research would suggest that frequent exposure to drug-related stimuli could affect the attentional processing of drug-related cues even if no actual drug use occurs. The present investigation examined attentional bias for smoking cues using a novel visual search paradigm amongst smokers currently in nicotine withdrawal and fully satiated smokers, as well as a non-smoker control group. Variables related to smoking behavior, as …