Psychology Commons^™

Event-Related Potential Markers Of Perceptual And Conceptual Speech Processes In Patients With Disorders Of Consciousness., Stephen T. Beukema

Electronic Thesis and Dissertation Repository

Vegetative state (VS) and minimally conscious state (MCS) patients behaviorally demonstrate absent or fluctuating levels of awareness. Functional magnetic resonance imaging evidence of covert perceptual and semantic speech processing provides prognostic value for these patients. In this thesis, I examined the utility of high-density electroencephalography (EEG) in this regard. A contrast between event-related potentials (ERPs) elicited by primed and unprimed word pairs was used to isolate conceptual (semantic) processes, while ERPs elicited by signal-correlated noise were contrasted with those elicited by speech to isolate pre-semantic, perceptual aspects of speech processing. These ERP effects were found to be both temporally and …

Neural Plasticity In Response To Intervention In Adolescents With Autism Spectrum Disorders, Sheryl Jayne Stevens

Dissertations (1934 -)

Current theories of Autism Spectrum Disorders (ASD) suggest that they may develop from the transactional interaction between biological risk factors and environmental processes (Dawson et al., 2009). Due to the brain’s experience-expectant nature, one’s degree of social exposure may have a significant impact on their brain development and behavioral presentation. In addition to the primary critical neurodevelopmental period identified in early childhood, recent research has demonstrated a second period of substantial neurodevelopment during the adolescent period (Sisk & Foster, 2004). This study investigated the neural and behavioral impact of participation in an empirically validated behavioral intervention (The Program for the …

The Electrophysiology Of Written Informal Language, Taylor S. Blaetz

Masters Theses & Specialist Projects

Language is an essential component of human behavior. It is ubiquitous, but more importantly, it is malleable and it is constantly changing. Part of the dynamic nature of informal communication is the introduction and adoption of new linguistic elements. Online communication provides a window into this informal public discourse; therefore, it may be useful for testing hypotheses about the processes underlying the acquisition and use of new words. The comprehension of informal language may lead to an understanding of how these new informal words are integrated into our mental lexicon. The current study was an electroencephalographic (EEG) investigation of the …

A Controlled Comparison Of Errorless And Errorful Learning In Individuals With Moderate-To-Severe Traumatic Brain Injury, Joseph Edward Fair

Theses and Dissertations

The prevalence and sequelae of moderate-to-severe (M/S) traumatic brain injury (TBI) are significant and pervasive problems, and effective rehabilitation techniques are key. Errorless learning is regarded as a useful tool for memory impairments; however, the efficacy of errorless learning in a M/S TBI population is unclear. The primary goal (aim 1) of this study was to evaluate the efficacy of a single session of errorless vs. errorful learning in a group of M/S TBI survivors and matched controls. A secondary goal (aim 2) was to investigate the neural time course of errorless learning in participants with M/S TBI by analyzing …

Electrophysiological Changes In P200 Latency And Amplitude Of Jittered Orientation Visual Integration Task In Healthy Participants: A Multi-Block Design Eeg Study, Monika M. Rozynski, Chi-Ming Chen

Honors Scholar Theses

Visual integration, the ability to fuse environmental information such as light, color, shades, and motion to form a representation of a whole cohesive higher-order visual image, is impaired in persons with schizophrenia. Little is known how the P200 component, an event-related potential (ERP) in the parieto-occipital region, is affected in persons with schizophrenia while they perform visual integration tasks, when compared to healthy persons. This study administered Gabor contours that varied in high and low degrees of orientational jitter through the Jitter Orientation Visual Integration (JOVI) task to investigate visual integration by analyzing latency and amplitude of the P200 component. …

Marital Satisfaction, Error-Observation, And The Brain: Harmful Or Beneficial Effects Of Spouse Observation?, Chelsea E. Romney, Michael Larson, Jonathan Sandberg, Patrick R. Steffen, Scott Baldwin

FHSS Mentored Research Conference

Introduction

Rewarding marital relationships are associated with many positive outcomes in one’s physical and mental health, including improved cardiovascular functioning, decreased depression risk, higher self-reported levels of happiness, and overall lower rates of mortality. The purpose of this study was to observe the differences in performance monitoring between males and females (while being observed by their spouses) using error-related brain activity (ERN). ERN is a response-locked, negative deflecting event-related potential (ERP) that occurs 50-100 milliseconds following an error. Heightened (i.e., more negative) ERN amplitude is associated with stressful or anxiety-provoking situations. Conversely, dampened ERN amplitude (i.e., less negative ERN) may …

Electrophysiological Changes Of N100 Latency And Amplitude In Healthy Participants Performing The Jitter Orientated Visual Integration Task: A Multi-Block Design Study, Fariya Naz

University Scholar Projects

The present study investigated the differences in processing during visual integration in healthy adults. The visual N100 indexes early visual discrimination and in this case, was hypothesized to show differences in both latency and amplitude depending on the level of difficulty which corresponds to orientational jitter in a visual integration task. Four blocks with pseudo-random levels of jitter were presented to participants in the Jitter Oriented Visual Integration (JOVI) task. Results looking at the Oz channel showed significant reduction in amplitude in the visual N100 during the more difficult levels condition of the task. The multi-block design, originally expected to …

Relationship Between Physiological And Clinical Measures Of Prospective Memory In Individuals With Mild Acquired Brain Injury, Severe Acquired Brain Injury And Healthy Adults, Consuelo M.A Pedro

Senior Theses and Projects

Prospective memory (PM) involves the ability to form and realize intentions after a time delay (Einstein & McDaniel, 1990). This study examines the relationship between clinical measures of PM and an event-related potential paradigm (West & Ross-Munroe, 2002). Electrophysiological and behavioral data were collected while subjects performed a computerized laboratory PM measure and was compared to a clinical measure, the Memory for Intentions Screening Test (MIST) (Raskin, Buckheit, & Sherrod, 2011) in healthy adults (HA), individuals with severe acquired brain injury (sABI) and mild acquired brain injury (mABI). Individuals with sABI performed significantly worse than individuals with mABI and HA …

The Neurophysiology Of Intersensory Selective Attention And Task Switching, Jeremy W. Murphy

Dissertations, Theses, and Capstone Projects

Our ability to selectively attend to certain aspects of the world and ignore others is fundamental to our day-to-day lives. The need for selective attention stems from capacity limitations inherent in our perceptual and cognitive processing architecture. Because not every elemental piece of our environment can be fully processed in parallel, the nervous system must prioritize processing. This prioritization is generally referred to as selective attention. Meanwhile, we are faced with a world that is constantly in flux, such that we have to frequently shift our attention from one piece of the environment to another and from one task to …

Measuring The Plasticity Of Social Approach: A Randomized Controlled Trial Of The Effects Of The Peers Intervention On Eeg Asymmetry In Adolescents With Autism Spectrum Disorders, Amy V. Van Hecke, Sheryl Jayne Stevens, Audrey M. Carson, Jeffrey S. Karst, Bridget Dolan, Kirsten A. Schohl, Ryan J. Mckindles, Rheanna Remmel, Scott Brockman

Psychology Faculty Research and Publications

This study examined whether the Program for the Education and Enrichment of Relational Skills (PEERS: Social skills for teenagers with developmental and autism spectrum disorders: The PEERS treatment manual, Routledge, New York, 2010a) affected neural function, via EEG asymmetry, in a randomized controlled trial of adolescents with Autism spectrum disorders (ASD) and a group of typically developing adolescents. Adolescents with ASD in PEERS shifted from right-hemisphere gamma-band EEG asymmetry before PEERS to left-hemisphere EEG asymmetry after PEERS, versus a waitlist ASD group. Left-hemisphere EEG asymmetry was associated with more social contacts and knowledge, and fewer symptoms of autism. Adolescents with …

Neural Correlates Of Inhibitory Function Following The Implicit Processing Of Emotional Faces, Lorri A. Kais

Master's Theses

Emotion and cognitive function interact to play a central role in determining

human thought and behavior. Attention to emotion can facilitate or hinder cognitive

control efforts based on the given contextual demands of the task at hand. This study used

scalp electroencephalography (EEG) methods to examine the link between valence of

facial stimuli and neural changes associated with emotional face processing and

subsequent inhibitory response. 20 participants completed a gender discrimination stop-

signal task using emotional faces. Facial valence did not differentially modulate the P200

event-related potential (ERP), indicating that happy and sad faces recruit similar neural

resources in the …

Electrophysiological And Behavioral Working Memory Differences Between Musicians And Non-Musicians, Benjamin P. Richardson

All Master's Theses

The current study examines the P300 brainwave and working memory differences between musicians and non-musicians. Differences in aspects of recorded electrical brain activity have been used to quantify differences in updating processes of working memory possibly related to differences in amount of music experience. The current study is designed to partially replicate and enhance a method previously implemented in research describing how music experience may be associated with differences in visual processing as well auditory working memory and executive function. Behavioral data were collected using six standardized subtest measures of the TOMAL – II, followed by ERP recordings during a …