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Articles 1 - 30 of 32
Full-Text Articles in Psychology
Damage To Association Fiber Tracts Impairs Recognition Of The Facial Expression Of Emotion, Carissa Philippi, Shruti Mehta, Thomas Grabowski, Ralph Adolphs, David Rudrauf
Damage To Association Fiber Tracts Impairs Recognition Of The Facial Expression Of Emotion, Carissa Philippi, Shruti Mehta, Thomas Grabowski, Ralph Adolphs, David Rudrauf
Psychology Faculty Works
No abstract provided.
Developmental Emergence Of Power-Law Wake Behavior Depends Upon The Functional Integrity Of The Locus Coeruleus, Andrew J. Gall, Badal Joshi, Janet Best, Virginia R. Florang, Jonathan A. Doorn, Mark S. Blumberg
Developmental Emergence Of Power-Law Wake Behavior Depends Upon The Functional Integrity Of The Locus Coeruleus, Andrew J. Gall, Badal Joshi, Janet Best, Virginia R. Florang, Jonathan A. Doorn, Mark S. Blumberg
Faculty Publications
STUDY OBJECTIVES:
Daily amounts of sleep and wakefulness are accumulated in discrete bouts that exhibit distinct statistical properties. In adult mammals, sleep bout durations follow an exponential distribution whereas wake bout durations follow a power-law distribution. In infant Norway rats, however, wake bouts initially follow an exponential distribution and only transition to a power-law distribution beginning around postnatal day 15 (P15). Here we test the hypothesis that the locus coeruleus (LC), one of several wake-active nuclei in the brainstem, contributes to this developmental transition.
DESIGN:
At P7, rats were injected subcutaneously with saline or DSP-4, a neurotoxin that targets noradrenergic …
Salivary Cortisol, Psychological Stress And Depressive Symptoms Among Patients Undergoing Colon Cancer Screenings, Allyson Reid
Salivary Cortisol, Psychological Stress And Depressive Symptoms Among Patients Undergoing Colon Cancer Screenings, Allyson Reid
Honors Scholar Theses
As the second leading cause of cancer-related deaths in the United States, colon cancer has a high cure rate if detected early by a colonoscopy (U.S.
Cancer Statistics Working Group, 2007). However, more than 41 million at-risk Americans are not properly receiving colonoscopy screenings according to the recommendations of the Center for Disease Control. This study provides insight into the physiological and psychological benefits of the colonoscopy procedure over and above cancer detection and prevention. Thirty-six patients receiving colonoscopic screening at the University of Connecticut Health Center participated in this study. A questionnaire battery that assessed perceived stress, depressive symptoms, …
Visuospatial Reasoning In Toddlers: A Correlational Study Of Door Task Performance, Iris Louella Price
Visuospatial Reasoning In Toddlers: A Correlational Study Of Door Task Performance, Iris Louella Price
Open Access Dissertations
Previous research using violation-of-expectation paradigms suggests that very young infants have a good understanding of unobserved physical events. Yet toddlers appear to lack this knowledge when confronted with the door task, a visuospatial reasoning task which parallels ones used in the habituation/looking time studies. Many studies have been conducted in an effort to determine why toddlers perform poorly on the door task yet the answer remains unclear. The current study used a correlational approach to investigate door task performance from both psychological (executive function), and neuroscience (prefrontal cortex) perspectives. Children between the ages of 2 ½ - 3 years were …
Same-Sex Social Behavior In Meadow Voles: Multiple And Rapid Formation Of Attachments, Annaliese K. Beery, David M. Routman, Irving Zucker
Same-Sex Social Behavior In Meadow Voles: Multiple And Rapid Formation Of Attachments, Annaliese K. Beery, David M. Routman, Irving Zucker
Neuroscience: Faculty Publications
Adult meadow voles (Microtus pennsylvanicus) are solitary in the spring–summer reproductive season, but during winter months, females and males are socially tolerant and aggregate in groups. This behavioral difference is triggered by day length: female meadow voles housed in short, winterlike day lengths form same-sex partner preferences, whereas those housed in long, summer-like day lengths are less social. The present study demonstrates that same-sex social attachments in short day lengths are not exclusive; females formed concurrent attachments with more than one individual, and with non-kin as well as siblings. Partner preferences between females were established within one day of cohousing …
Microsaccade Rate Varies With Subjective Visibility During Motion-Induced Blindness, Po-Jang Hsieh, Peter U. Tse
Microsaccade Rate Varies With Subjective Visibility During Motion-Induced Blindness, Po-Jang Hsieh, Peter U. Tse
Dartmouth Scholarship
Motion-induced blindness (MIB) occurs when a dot embedded in a motion field subjectively vanishes. Here we report the first psychophysical data concerning effects of microsaccade/eyeblink rate upon perceptual switches during MIB. We find that the rate of microsaccades/eyeblink rises before and after perceptual transitions from not seeing to seeing the dot, and decreases before perceptual transitions from seeing it to not seeing it. In addition, event-related fMRI data reveal that, when a dot subjectively reappears during MIB, the blood oxygen-level dependent (BOLD) signal increases in V1v and V2v and decreases in contralateral hMT+. These BOLD signal changes observed upon perceptual …
Criterial Noise Effects On Rule-Based Category Learning: The Impact Of Delayed Feedback, Shawn W. Ell, David A. Ing, Todd W. Maddox
Criterial Noise Effects On Rule-Based Category Learning: The Impact Of Delayed Feedback, Shawn W. Ell, David A. Ing, Todd W. Maddox
Psychology Faculty Scholarship
Variability in the representation of the decision criterion is assumed in many category learning models yet few studies have directly examined its impact. On each trial, criterial noise should result in drift in the criterion and will negatively impact categorization accuracy, particularly in rule-based categorization tasks where learning depends upon the maintenance and manipulation of decision criteria. The results of three experiments test this hypothesis and examine the impact of working memory on slowing the drift rate. Experiment 1 examined the effect of drift by inserting a 5 s delay between the categorization response and the delivery of corrective feedback, …
To See Or Not To See: Prestimulus Α Phase Predicts Visual Awareness, Kyle E. Mathewson, Gabriele Gratton, Monica Fabiani, Diane M. Beck, Tony Ro
To See Or Not To See: Prestimulus Α Phase Predicts Visual Awareness, Kyle E. Mathewson, Gabriele Gratton, Monica Fabiani, Diane M. Beck, Tony Ro
Publications and Research
We often fail to see something that at other times is readily detectable. Because the visual stimulus itself is unchanged, this variability in conscious awareness is likely related to changes in the brain. Here we show that the phase of EEG α rhythm measured over posterior brain regions can reliably predict both subsequent visual detection and stimulus-elicited cortical activation levels in a metacontrast masking paradigm. When a visual target presentation coincides with the trough of an α wave, cortical activation is suppressed as early as 100 ms after stimulus onset, and observers are less likely to detect the target. Thus, …
Does Type Of Stimulus Influence Task-Irrelevant Evaluative Categorization Processes?, Guadalupe Corral
Does Type Of Stimulus Influence Task-Irrelevant Evaluative Categorization Processes?, Guadalupe Corral
Open Access Theses & Dissertations
The effect of stimulus type on task-irrelevant evaluative categorization was examined in two separate studies by using the P3 component from event-related brain potentials. The first study presented idiosyncratic stimuli consisting of individuals that were rated by participants as either positive or negative within sequences of pictorial and verbal stimuli. The second study presented sequences of novel and familiar stimuli consisting of previously normed unattractive and neutral individuals. It was hypothesized that pictures would elicit task-irrelevant evaluative categorization processes and so would novel stimuli (relative to words and familiar stimuli, respectively). Task-irrelevance was examined by assessing P3 peak amplitude to …
Characterization Of The Behavioral And Neurochemical Effects Of Nicotine Withdrawal In Adolescent And Adult Rats., Luis Alberto Natividad
Characterization Of The Behavioral And Neurochemical Effects Of Nicotine Withdrawal In Adolescent And Adult Rats., Luis Alberto Natividad
Open Access Theses & Dissertations
Previous studies have demonstrated that the behavioral effects of nicotine withdrawal are lower in adolescent versus adult rats. However, the neurochemical mechanisms that mediate these developmental differences are presently unclear. Much work has shown that nicotine reward is mediated via enhanced dopamine neurotransmission in the mesolimbic pathway which originates in the ventral tegmental area (VTA) and terminates in several forebrain structures including the nucleus accumbens (NAcc). More recently, studies have shown that nicotine withdrawal produces a decrease in NAcc dopamine transmission, an effect that is believed to serve as a neurochemical marker of withdrawal in adult rodents. The goal of …
Impact Of Serotonin 2c Receptor Null Mutation On Physiology And Behavior Associated With Nigrostriatal Dopamine Pathway Function., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Alcohol Self-Administration Acutely Stimulates The Hypothalamic-Pituitary-Adrenal (Hpa) Axis, But Alcohol Dependence Leads To A Dampened Neuroendocrine State, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Female Rats Display Dose-Dependent Differences To The Rewarding And Aversive Effects Of Nicotine In An Age-, Hormone-, And Sex-Dependent Manner., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Rodent Models Of Nicotine Reward: What Do They Tell Us About Tobacco Abuse In Humans?, Laura O'Dell
Rodent Models Of Nicotine Reward: What Do They Tell Us About Tobacco Abuse In Humans?, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Nicotine Withdrawal Produces Fewer Decreases In Extracellular Levels Of Dopamine In The Nucleus Accumbens Of Adolescent Versus Adult Rats., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
A Psychobiological Framework Of The Substrates That Mediate Nicotine Use During Adolescence, Laura O'Dell
A Psychobiological Framework Of The Substrates That Mediate Nicotine Use During Adolescence, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Affective Decision-Making Predictive Of Chinese Adolescent Drinking Behaviors, Lin Xiao, Antoine Bechara, Jerry L. Grenard, Alan W. Stacy, Paula Palmer, Yonglan Wei, Yong Jia, Xiaolu Fu, C. Anderson Johnson
Affective Decision-Making Predictive Of Chinese Adolescent Drinking Behaviors, Lin Xiao, Antoine Bechara, Jerry L. Grenard, Alan W. Stacy, Paula Palmer, Yonglan Wei, Yong Jia, Xiaolu Fu, C. Anderson Johnson
CGU Faculty Publications and Research
The goal of the current investigation was to address whether affective decision making would serve as a unique neuropsychological marker to predict drinking behaviors among adolescents. We conducted a longitudinal study of 181 Chinese adolescents in Chengdu city, China. In their 10th grade (ages 15–16), these adolescents were tested for their affective decision-making ability using the Iowa Gambling Task (IGT) and working memory capacity using the Self-Ordered Pointing Test. Self-report questionnaires were used to assess academic performance and drinking behaviors. At 1-year follow-up, questionnaires were completed to assess drinking behaviors, and the UPPS Impulsive Behavior Scale was used to examine …
Analyzing Anticipatory Muscle Tensing As A Measure Of Prospective Action, Kristin Michelle Reardon
Analyzing Anticipatory Muscle Tensing As A Measure Of Prospective Action, Kristin Michelle Reardon
Dissertations, Theses, and Masters Projects
No abstract provided.
Does Humor Benefit Health In Retirement?: Exploring Humor As A Moderator, Gillian P. Freeman
Does Humor Benefit Health In Retirement?: Exploring Humor As A Moderator, Gillian P. Freeman
Dissertations, Theses, and Masters Projects
No abstract provided.
A Study Of Possible Pre-Cognitive Advantages Of Bilingualism, Marisela Gutierrez
A Study Of Possible Pre-Cognitive Advantages Of Bilingualism, Marisela Gutierrez
Open Access Theses & Dissertations
Past research has suggested that second language acquisition has a beneficial effect on the development of inhibitory control processes in children and adults. This has been referred to as the "bilingual advantage" and is most commonly quantified using the Simon task. Whether the bilingual advantage extends to precognitive mechanisms has not yet been examined. The goals of this study were to examine the bilingual advantage in university students; and to examine whether the bilingual advantage extends to the precognitive filtering mechanism of sensorimotor gating. It was predicted that, as compared to monolinguals, bilingual university students would have greater inhibitory control, …
The Neuroscientific Study Of The Self: Methodological And Theoretical Challenges, Cynthia J. Najdowski, Samuel E. Winer
The Neuroscientific Study Of The Self: Methodological And Theoretical Challenges, Cynthia J. Najdowski, Samuel E. Winer
Psychology Faculty Scholarship
Neuroscientific research methods, such as brain imaging techniques, have increasingly been applied to social cognitive research efforts and, in particular, to the study of the self. In this essay we discuss the ability of such research to shed light on the emergent, dynamic psychological phenomenon of self. Although neuroscientific tools can be useful for gaining general knowledge about associated underlying structures, a careful consideration of the methodological and theoretical issues discussed herein is necessary to avoid simplifying or reifying the self.
"The Natural History Of Truth: The Neurobiology Of Belief", Neil Greenberg
"The Natural History Of Truth: The Neurobiology Of Belief", Neil Greenberg
Faculty Publications and Other Works -- Ecology and Evolutionary Biology
The pursuit of truth is woven into the fabric of every organism*. Any estimate of how best to survive and thrive in the reality in which we are immersed requires a sense of self, of the world, and of their relationship to each other. I wish to explore the idea that this pursuit has at its heart two complementary modes of reality testing utilizing separate cerebral systems which deal, respectively with the correspondence of experience with the world and the coherence of the experience with previous experiences: “is it real” and “does it fit?” At multiple levels of the nervous …
Neurocognitive Deficits And Functional Outcome In Bipolar Disorder, Danielle T. Bello
Neurocognitive Deficits And Functional Outcome In Bipolar Disorder, Danielle T. Bello
UNLV Theses, Dissertations, Professional Papers, and Capstones
Bipolar disorder affects approximately 1% of the population. It is a severe and debilitating illness, causing serious impairment of interpersonal, occupational and social functioning. The disorder is characterized by marked mood swings as well significant neurocognitive deficits. Based on work with other psychiatric and neurological disorders, neurocognitive deficits in bipolar disorder are expected to be strong predictors of functional capacity. However, few studies have evaluated the consequences of neurocognitive deficits in this disorder. Most available studies have focused on the clinical correlates of functional outcome, such as number of hospitalizations, age of disorder onset, and severity of symptoms. While useful, …
Blockade Of Muscarinic M1 Receptors Disrupts Performance On An Attention-Demanding Visual Discrimination Task, Andrea Maureen Robinson
Blockade Of Muscarinic M1 Receptors Disrupts Performance On An Attention-Demanding Visual Discrimination Task, Andrea Maureen Robinson
Dissertations, Theses, and Masters Projects
No abstract provided.
Brain Activation For Reading And Listening Comprehension: An Fmri Study Of Modality Effects And Individual Differences In Language Comprehension., Augusto Buchweitz, Robert Mason, Tomitch Leda, Marcel Just
Brain Activation For Reading And Listening Comprehension: An Fmri Study Of Modality Effects And Individual Differences In Language Comprehension., Augusto Buchweitz, Robert Mason, Tomitch Leda, Marcel Just
Marcel Adam Just
No abstract provided.
Altering Cortical Connectivity: Remediation-Induced Changes In The White Matter Of Poor Readers, Timothy Keller, Marcel Just
Altering Cortical Connectivity: Remediation-Induced Changes In The White Matter Of Poor Readers, Timothy Keller, Marcel Just
Marcel Adam Just
No abstract provided.
Japanese And English Sentence Reading Comprehension And Writing Systems: An Fmri Study Of First And Second Language Effects On Brain Activation, Augusto Buchweitz, Robert A. Mason, Akiko Hasegawa, Marcel Adam Just
Japanese And English Sentence Reading Comprehension And Writing Systems: An Fmri Study Of First And Second Language Effects On Brain Activation, Augusto Buchweitz, Robert A. Mason, Akiko Hasegawa, Marcel Adam Just
Marcel Adam Just
No abstract provided.
Atypical Frontal-Posterior Synchronization Of Theory Of Mind Regions In Autism During Mental State Attribution, Rajesh K. Kana, Timothy A. Keller, Vladimir L. Cherkassky, Nancy J. Minshew, Marcel Adam Just
Atypical Frontal-Posterior Synchronization Of Theory Of Mind Regions In Autism During Mental State Attribution, Rajesh K. Kana, Timothy A. Keller, Vladimir L. Cherkassky, Nancy J. Minshew, Marcel Adam Just
Marcel Adam Just
No abstract provided.
The Role Of The Theory-Of-Mind Cortical Network In The Comprehension Of Narratives, Robert Mason, Marcel Just
The Role Of The Theory-Of-Mind Cortical Network In The Comprehension Of Narratives, Robert Mason, Marcel Just
Marcel Adam Just
No abstract provided.
Protracted Withdrawal From Alcohol And Drugs Of Abuse Impairs Long-Term Potentiation Of Intrinsic Excitability In The Juxtacapsular Bed Nucleus Of The Stria Terminalis, Laura O'Dell
Laura Elena O'Dell
No abstract provided.