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Factor Structure Of The Cpt-Ii, Mary Vertinski

UNLV Theses, Dissertations, Professional Papers, and Capstones

The current study investigates the factor structure of the Conners' Continuous Performance Test-II (CPT-II) in four pediatric samples of participants: (a) patients with traumatic brain injury, (b) healthy controls, (c) patients with various clinical diagnoses, and (d) all of the previously mentioned subjects combined. Confirmatory factor analyses (CFA) were used to investigate a one-, three- and four-factor model fit of the data. None of the models examined were an adequate fit for the data; however, it appears that the four-factor model seemed to be the best fitting of the models examined. Failure to find reasonably adequate fit precluded further analyses.

Attention Modulates Erp Indices Of The Precedence Effect, Benjamin H. Zobel

Masters Theses

When presented with two identical sounds from different locations separated by a short onset asynchrony, listeners report hearing a single source at the location of the lead sound, a phenomenon called the precedence effect (Wallach et al., 1949; Haas, 1951). When the onset asynchrony is above echo threshold, listeners report hearing the lead and lag sounds as separate sources with distinct locations. Event-related potential (ERP) studies have shown that perception of separate sound sources is accompanied by an object-related negativity (ORN) 100-250 ms after onset and a late posterior positivity (LP) 300-500 ms after onset (Sanders et al., 2008; Sanders …

Biological Motion Processing In Typical Development And In The Autism Spectrum, Aaron Krakowski

Dissertations, Theses, and Capstone Projects

Biological motion (BM) analysis and interpretation is a fundamental process of human neurocognition that has been only minimally explored neurophysiologically. In addition to its importance in understanding the underlying roots and development of social cognition, BM processing is a prime candidate domain for exploring the underlying etiology of social cognitive disorders such as the autism spectrum.

In an initial experiment, typical adults observed BM point-light displays of a human actor (UM) as well as their spatially scrambled counterparts (SM), in both an unattended distractor task as well as an explicit attention task. Results showed a neurophysiological response manifested as three …

Attachment And Attention: An Investigation Of Biases In Attention As They Relate To Attachment Security In Infancy And Adulthood, Paul J. Meinz

Electronic Thesis and Dissertation Repository

At the advent of attachment theory, John Bowlby hypothesized that cognition and emotion are shaped by early experiences with primary caregivers (Bowlby, 1980). This idea – that aspects of cognition may be organized within early relationships – still plays a prominent role in contemporary attachment theory. The studies described within this dissertation provide support for the idea that attachment security in infancy and adulthood are associated with differences in cognition – particularly with differences in the way that people attend to certain forms of stimuli. Mothers and children in the studies described here were first assessed for individual differences in …

The Effect Of Local Element Density On Processing Of Visual Hierarchical Patterns: An Infant Erp Study, Sara M. Mosteller

Masters Theses

Previous research with infants, children, and adults has shown that global, or configural, information is processed before local, or featural, information in high density visual hierarchical patterns (Freeseman, Colombo, & Coldren, 1993; Ghim & Eimas, 1988; Kimchi, 1988; Navon, 1981; Navon, 1977). The current study used event-related potential to determine if a well documented bias toward global processing in infancy can be disrupted when the number and density of local elements is reduced through increasing the distance between elements. Infant responses were compared between high and low density conditions to global and local novel patterns and to familiar patterns. A …

Emotional Interference Of Response Inhibition In Obsessive-Compulsive Disorder, Thomas Grover Adams

Graduate Theses and Dissertations

Researchers have hypothesized that failures of inhibition are partially responsible for habitual and perseverative symptoms that are unique to Obsessive-Compulsive Disorder (OCD). It is also well known that sequelae of emotional processes are also implicated in the etiology and maintenance of obsessions and compulsions. However, little research has tested how emotional processes moderate inhibitory functions in OCD. In the present study, high contamination phobic (HCP, n = 17) and low contamination phobic (LCP, n = 30) participants completed an emotional go/no-go task, which measured the interfering effects contamination-threat processing on action restraint. The present study had a two level between-subjects-quasi-independent …

Dual Task Interference In Low-Level Abilities: The Role Of Working Memory And Effects Of Mathematics Anxiety, Alex Michael Moore

UNLV Theses, Dissertations, Professional Papers, and Capstones

Mathematics anxiety is a negative affective reaction to situations involving mathematical thought and is commonly believed to reduce cognitive functioning by impairing the efficient use of working memory resources. The conventional theory describes that the processing disadvantage associated with high levels of math anxiety increasingly impairs performance as working memory demands increase in a math task. Despite this convention, recent reports demonstrate that the high math anxious disadvantage can be measured in tasks that are relatively free of working memory assistance (Maloney, Ansari, & Fugelang, 2011; Maloney, Risko, Ansari, & Fugelsang, 2010). The present study examines these relatively low level …

Visual Attention Shifting In Autism Spectrum Disorder, Annette E. Richard

Master's Theses and Doctoral Dissertations

Much research to date has been devoted to understanding the neurocognitive abnormalities characteristic of autism spectrum disorders (ASD). Abnormalities in visual attention are particularly notable in ASD and have the potential to inform an understanding of the aberrant neural networks underlying this disorder. The current study utilized a model integrating components of both a two-stage model of perceptual binding and Posner's model of attention in order to provide a coherent account of previous findings of both enhanced and impaired visual attention abilities in ASD. To investigate a potential deficit in attention shifting underlying a variety of observed attentional abnormalities in …

Assessing Executive Function As It Relates To Self-Regulation, Sarah K. Finley

Masters Theses and Doctoral Dissertations

Slips of action are cognitive errors that occur during routine tasks in everyday life (Clark, Parakh, Smilek, & Roy, 2012). Minimizing these everyday errors involves executive function, a system of complementary cognitive processes that enable control over thoughts and actions, including attention, inhibition, cognitive switching, and maintaining and manipulating the contents of working memory (Norman & Shallice, 2000). Many aspects of executive function are necessary for self-regulation, or the management of habitual, dominant, prepotent responses (Hamilton, Vohs, Sellier, & Meyvis, 2011). The present study explored the relationship between self-regulation, using self-report questionnaires, and executive function, using task-based assessments. Greater self-regulatory …

The Effects Of Musical Mood And Musical Arousal On Visual Attention, Angela B. Marti Marca, Tram Nguyen, Jessica Grahn

Undergraduate Honors Theses

The presence of music is a visceral part of the human experience and its influence on cognitive function is a growing area of research in psychology. In particular, perceptual properties of music (mood and arousal) have been shown to significantly affect performance. There has been minimal research in the field on the interaction of mood and arousal and their influence on attention, thus the purpose of this study. Fifty undergraduate students currently enrolled at the University of Western Ontario were recruited for this study. Given that music is a highly subjective experience, participants rated an assortment of music clips on …

On The Role Of Neuronal Oscillations In Auditory Cortical Processing, Monica Noelle O'Connell

Dissertations, Theses, and Capstone Projects

Although it has been over 100 years since William James stated that "everyone knows what attention is", its underlying neural mechanisms are still being debated today. The goal of this research was to describe the physiological mechanisms of auditory attention using direct electrophysiological recordings in macaque primary auditory cortex (A1). A major focus of my research was on the role ongoing neuronal oscillations play in attentional modulation of auditory responses in A1.

For all studies, laminar profiles of synaptic activity, (indexed by current source density analysis) and concomitant firing patterns in local neurons (multiunit activity) were acquired simultaneously via linear …

Do Parent And Teacher Ratings Of Behavior Measure What They Are Intended To Measure?, Phillip Martin

Theses and Dissertations

This study involves an examination of the neurocognitive correlates of subscales of the Conners' Rating Scale - Revised (CRS-R), an ADHD behavioral rating form, in both a child (n=72) and an adolescent (n=49) sample. While both behavioral rating forms and neuropsychological measures are commonly employed in pediatric clinical evaluations, these two forms of assessment do not generally converge as expected. The purpose of the current research was to examine and compare the abilities of intellectual, academic, attentional, and executive skills to account for variance in parent and teacher ratings of behavior across two pediatric age groups in a clinical setting. …

Cognitive Effects And Academic Consequences Of Video Game Playing, Sean Hollis

Electronic Theses and Dissertations

Introduction: prior video game playing (vgp) research has generated mixed empirical findings. Recent studies suggested positive effects vgp may have on cognitive skills, particularly improvements in visuospatial skills, processing speed, working memory, multitasking, and problem solving skills. By contrast, other studies have suggested that vgp leads to lower academic performance - indicating further research on vgp effects is needed. This study investigated the effects of vgp on cognitive skills and academic performance. Methods: 208 participants were recruited from the University of Mississippi psychology department in exchange for research participation credit. The sample was 68.9% female and 31.1% male. Ages ranged …

Influencing The Allocation Of Attentional Resources In Tracking: Evidence For A Combined Parallel And Serial Mechanism, Justin Merrill Ericson

LSU Doctoral Dissertations

The ability to track multiple moving objects (e.g. cars on a roadway, players and/or balls in a sporting event, pedestrians in a crowded space) has been thought to be a parallel process, such that all the objects are tracked simultaneously (Howe et al., 2010). Others have asserted that some serial mechanism is involved in the tracking process, suggesting that there are shifts of attention from object to object in order to successfully track (Oksama & Hyönä, 2008). Subsequent research has demonstrated that changes in trajectory can attract attention (Howard & Holcombe, 2010) and that these localized changes in trajectory negatively …