Social and Behavioral Sciences Commons^™

Peak Alpha Frequency: An Electroencephalographic Measure Of Cognitive Preparedness, Efthymios Angelakis

Doctoral Dissertations

Background.

Electroencephalographic (EEG) peak alpha frequency (PAF) has been shown to correlate with a variety of phenomena, including age, memory performance in healthy and demented individuals, different emotional states, schizophrenia, anxiety, recovery from stroke, cerebral blood flow (CBF) velocity, brain oxygenation, as well as acute administration of stimulant and nootropic substances. These studies have shown that PAF varies between healthy and clinical individuals, with the latter consistently having lower PAF. Moreover, PAF varies between healthy individuals, reflecting cognitive performance, with better performance being associated with increased PAF. Finally, PAF varies within individuals both between developmental stages and between different cognitive …

Eeg Patterns Of Tbi Patients With Attention Deficits During Cognitive Tasks And Second Resting Baseline, Stamatina Stathopoulou

Doctoral Dissertations

According to previous research, different regions of the brain are activated when a person is required to use different types of attention like selective, alternating, focused, sustained and divided attention. The frontal, prefrontal and parietal areas especially in the right hemisphere, seem to be the most frequently activated areas. Little research has addressed differences in the electroencephalogram (EEG) between traumatic brain injured (TBI) patients, with different types of attentional deficits because of their injury, and normal population. This study focuses on differences in magnitude in five brain regions between TBI patients and normal population, during recording of one cognitive task …

The Integrative Model Of Personality Assessment For Achievement Motivation And Fear Of Failure: Implications For The Prediction Of Effort And Performance, Mark Nathaniel Bing

Doctoral Dissertations

While both self-report (SR) and conditional reasoning (CR) measures of achievement motivation (AM) and fear-of-failure (FF) have been shown to be predictive of academic and organizational outcomes (James, 1998; Spangler, 1992), substantial criterion variance is often left unaccounted for by either measurement system when used in isolation. The current work proposes a new, theoretical model of AM and FF created by integrating information on explicit cognitions gathered from SR with information on implicit cognitions gathered from CR. This “integrative model” of assessment provides an enhanced understanding of the approach-avoidance conflicts people experience when they are faced with challenging tasks. Predictions …

A Phenomenological Study Of The Experience Of Travel, Norris Lee Smith

Doctoral Dissertations

To describe and gain an understanding of the experience and meaning of travel, ten participants were asked to “tell me about some times you’ve traveled that stand out to you.” These interviews were non-structured, and the ensuing dialogue served as data for a research project concerning first-person accounts of the lived experience of travel. Once completed, each interview was typed and underwent hermeneutic analysis within the context of an interpretive research group. Results of thematic analysis revealed that travel was described as a movement away from “home,” a venturing out, which was characterized by participants in figure-ground terms. For this …

Optimistic Personality, Work Performance, And Interpersonal Relationships At Work: A Field Study, Fung Ming Chan

Masters Theses

A field study examines the personality trait optimism, defined as an enduring personal tendency to expect favorable outcomes, in relation to work performance and interpersonal relationships at work. Based on prior research and theory, the hypothesis predicts that optimism will correlate positively with job performance and positively with the quality of interpersonal relationships with co-workers and supervisors. 282 employees at a large manufacturing plant in the southeastern United States completed a work-based measure of personality, the Personal Style Inventory (PSI). Participants’ immediate supervisors rated the employee’s job performance and the quality of their interpersonal relationships with peers and supervisors. Statistical …

Adaptive Functions Of The Corpus Striatum: The Past And Future Of The R-Complex, Neil Greenberg

Faculty Publications and Other Works -- Ecology and Evolutionary Biology

The basal ganglia is emerging from the shadow cast by the most conspicuous clinical expression of its dysfunction: motor disorders.What is revealed is the nexus of a widely distributed system which functions in integrating action with cognition, motivation, and affect. Prominent among non-motor functions are striatal involvement in building up of sequences of behavior into meaningful, goal-directed patterns and repertoires and the selection of appropriate learned or innate sequences in concert with their possible predictive control. Further, striatum seems involved in declarative and strategic memory (involving intentional recollection and the management of retrieved memories, respectively). Findings from reptile experiments indicate …

Ethological Aspects Of Stress In A Model Lizard, Anolis Carolinensis, Neil Greenberg

Faculty Publications and Other Works -- Ecology and Evolutionary Biology

Research on the stress response in reptiles can provide a useful comparative perspective for understanding how the constituent elements of the response can be put into service of diverse behavioral adaptations. A summary of the neural and endocrine causes and consequences of specific behavioral patterns seen in the small diurnal lizard, Anolis carolinensis, has provided a model for the exploration of the dynamics of autonomic and neurohormonal contributions to adaptive behavior.

In this species, changes in body color provide indices of the flux of circulating stress relevant hormones, and are seen in situations from spontaneous exploration through agonistic behavior. Furthermore, …

Ethological Causes And Consequences Of The Stress Response, Neil Greenberg, James A. Carr, Cliff H. Summers

Faculty Publications and Other Works -- Ecology and Evolutionary Biology

Stress involves real or perceived changes within an organism or in the environment that activate an organism’s attempts to cope by means of evolutionarily ancient neural and endocrine mechanisms. Responses to acute stressors involve catecholamines released in varying proportion at different sites in the sympathetic and central nervous systems. These responses may interact with and be complemented by intrinsic rhythms and responses to chronic or intermittent stressors involving the hypothalamic-pituitary-adrenal axis. Varying patterns of responses to stressors are also affected by an animal=s assessment of their prospects for successful coping. Subsequent central and systemic consequences of the stress response include …