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Articles 1 - 9 of 9
Full-Text Articles in Biological Psychology
Mechanisms Of Value-Biased Prioritization In Fast Sensorimotor Decision Making, Kivilcim Afacan-Seref
Mechanisms Of Value-Biased Prioritization In Fast Sensorimotor Decision Making, Kivilcim Afacan-Seref
Dissertations and Theses
In dynamic environments, split-second sensorimotor decisions must be prioritized according to potential payoffs to maximize overall rewards. The impact of relative value on deliberative perceptual judgments has been examined extensively, but relatively little is known about value-biasing mechanisms in the common situation where physical evidence is strong but the time to act is severely limited. This research examines the behavioral and electrophysiological indices of how value biases split-second perceptual decisions and the possible mechanisms underlying the process. In prominent decision models, a noisy but statistically stationary representation of sensory evidence is integrated over time to an action-triggering bound, and value-biases …
Making Smart Choices When Faced With Risk: The Role Of Interoceptive Awareness And Life Stress On Implicit Learning., Ronald A. Nicholson
Making Smart Choices When Faced With Risk: The Role Of Interoceptive Awareness And Life Stress On Implicit Learning., Ronald A. Nicholson
Dissertations and Theses
In complex situations where there is an unclear link between the available options and an advantageous outcome, visceral signals of arousal play a role in decision-making. Perception of the body’s various visceral signals is called interoceptive awareness (IA). Exposure to stressful events can impede the production and perception of these signals, leading to a potentially impaired perception of risk and impeded decision-making. However, there is a paucity of research exploring the impact of life event stress on IA, or how both of these factors may influence the dynamic process of decision-making during risk. To address this gap the current study …
A Systems Approach To Stress And Resilience In Humans: Mindfulness Meditation, Aging, And Cognitive Function, Barry S. Oken
A Systems Approach To Stress And Resilience In Humans: Mindfulness Meditation, Aging, And Cognitive Function, Barry S. Oken
Dissertations and Theses
Psychological stress is common and contributes to many physical and mental health problems. Its effects are mediated by a complex neurobiological system centering in the brain with effectors including autonomic nervous system, hypothalamic-pituitary-adrenal axis, inflammatory system, and gene expression. A stressor pushes the human physiological system away from its baseline state towards a lower utility state. The physiological system may return towards the original state but may be shifted to a lower utility state. While some physiological changes induced by stressors may benefit health, chronic stressors usually have negative effects on health. In contrast to this stressor effect is the …
A Comparison Of The Effects Of Emg Biofeedback And Relaxation Training On Chronic Back Pain Patients, Pam W. Vredevelt
A Comparison Of The Effects Of Emg Biofeedback And Relaxation Training On Chronic Back Pain Patients, Pam W. Vredevelt
Dissertations and Theses
This experiment examined the effects of EMG biofeedback and relaxation training as compared with biofeedback alone. The following dependent variables were examined: manifest anxiety, perceived pain, perceived relaxation, EMG activity, and locus of control. Back pain patients were assigned to one of two treatment groups. Group 1 was treated with both EMG biofeedback and relaxation training. Group 2 was treated with biofeedback alone. It appears that both biofeedback combined with progressive relaxation and biofeedback training alone are effective in lowering muscle activity and perceived pain, and in increasing perceived relaxation. However, from the results of this study, it is impossible …
Effect Of Menstrual Cycle On Hedonic Response To Gustatory Stimuli, Laurie Ann O'Toole
Effect Of Menstrual Cycle On Hedonic Response To Gustatory Stimuli, Laurie Ann O'Toole
Dissertations and Theses
The present experiment was conducted to determine the relationship between the human menstrual cycle and gustatory hedonic response. Hedonic response was defined as the perceived pleasantness or unpleasantness of a taste stimulus. Gender differences in taste hedonic have been observed; these may be due to differences in endocrine systems. Animal taste preferences are altered when reproductive hormonal status is experimentally manipulated. Previous researchers report that human females' hedonic responses to sucrose vary systematically with phase of menstrual cycle.
Hemisphere Side Of Damage And Encoding Capacity, Margaret Ellen Davis
Hemisphere Side Of Damage And Encoding Capacity, Margaret Ellen Davis
Dissertations and Theses
This study was designed to examine whether normal information processing does engage both hemispheres of the brain regardless of sensory channel (i.e., auditory or visual), and whether an opportunity for dual encoding (verbal and visual) was advantageous for patients with unilateral brain damage. It compared memory for verbal material presented in the visual and auditory modalities among three groups: right hemisphere brain damaged stroke patients (RBD), left hemisphere brain damaged stroke patients (LBD), and neurologically intact control subjects.
The Effect Of Early Handling On The Sexually Dimorphic Rate Of Extinction Of A Conditioned Taste Aversion In Rats, Rebecca Lee Yoder
The Effect Of Early Handling On The Sexually Dimorphic Rate Of Extinction Of A Conditioned Taste Aversion In Rats, Rebecca Lee Yoder
Dissertations and Theses
Male rats have been found to extinguish a conditioned taste aversion slower than females. It has also been found that female rats that have been "handled" (i.e., exposed to daily brief isolation from siblings and mother) during the preweaning period extinguish a taste aversion faster than nonhandled females. The present study sought to combine and extend these findings by testing handled and nonhandled females and males in a conditioned taste aversion under the methodological conditions used in the sex difference research.
Mental Illness Among Chinese In The United States: Myth Or Reality?, Alex C. N. Leung
Mental Illness Among Chinese In The United States: Myth Or Reality?, Alex C. N. Leung
Dissertations and Theses
Several mental health professionals have suggested that Chinese in the United States as a group are less subject to mental disorders than other races. Whereas other investigators have also indicated that due to the influences of cultural conflict and racism, Chinese in the United States are under greater emotional distress than members of the host society. When stress from these sources becomes too great, mental health problems are frequently the result.
The purpose of this library research thesis is to review the available research works related with Chinese Americans mental health problems in the hope of seeking answers to the …
Exteroceptive Influence On A Marihuana Induced Conditioned Taste Aversion, Albert William Greenwood
Exteroceptive Influence On A Marihuana Induced Conditioned Taste Aversion, Albert William Greenwood
Dissertations and Theses
Forty-five male, Sprague Dawley rats were used to determine if external stimuli could influence the length of a conditioned taste aversion. Animals were given a novel taste (sucrose), and then injected with one of three different substances, marihuana, LiCI, or saline. The animals were then placed into either a stimulation condition, a non-stimulation condition, or returned to the home cage. The stimulation condition contained aversive stimuli in the form of bright, flashing lights and loud noises. The other conditions had no aversive stimulation. It was expected that the animals receiving injections of marihuana would have an increase in their responsiveness …