Quantitative Psychology Commons^™

Neurochemical Effects Of Amyloid-Beta Oligomers In Rats, John J. Panos

Dissertations

Alzheimer’s disease is a progressive neurodegenerative disease characterized by memory loss and cognitive decline. Although the symptomology of Alzheimer’s disease is well defined, its precise etiology remains elusive. Animal models are invaluable for understanding the pathogenesis of this devastating disease. Knowledge of the neurochemical actions of amyloid-β oligomers in specific brain structures is essential for validating animal models of Alzheimer’s disease and for determining the most appropriate behavioral assays of memory. The specific aim of this project was to investigate the neurochemical effects of direct intracerebral infusion of amyloid-β oligomers in the rat. Experiment 1 investigated direct infusions of synthetic …

The Statistical Properties Of The Survivor Interaction Contrast, Joseph W. Houpt, James T. Townsend

Psychology Faculty Publications

The Survivor Interaction Contrast (SIC) is a powerful tool for assessing the architecture and stopping rule of a model of mental processes. Despite its demonstrated utility, the methodology has lacked a method for statistical testing until now. In this paper we briefly describe the SIC then develop some basic statistical properties of the measure. These developments lead to a statistical test for rejecting certain classes of models based on the SIC. We verify these tests using simulated data, then demonstrate their use on data from a simple cognitive task.

Socially Desirable Responding On The Mmpi -2, Mcmi-Iii, And Pai In A Substance Abuse Treatment Setting, James Brian Rutland

Doctoral Dissertations

Objectively scored measures of psychopathology are increasingly relied upon to aid in the diagnosis of mental disorders and treatment planning, and three commonly used measures are the MMPI-2, MCMI-III, and PAI. A difficulty with such measures, however, is that response sets are subject to both intentional and unintentional distortion by examinees. Underreporting of psychopathology and attempts to present oneself in an overly favorable light can be particularly difficult to detect. Therefore, scales and other indices have been developed to identify underreporting and defensiveness. Paulhus (2002) has developed and refined a model for this phenomenon of underreporting, which he calls Socially …

Improving Irt Parameter Estimates With Small Sample Sizes: Evaluating The Efficacy Of A New Data Augmentation Technique, Brett P. Foley

College of Education and Human Sciences: Dissertations, Theses, and Student Research

The 3PL model is a flexible and widely used tool in assessment. However, it suffers from limitations due to its need for large sample sizes. This study introduces and evaluates the efficacy of a new sample size augmentation technique called Duplicate, Erase, and Replace (DupER) Augmentation through a simulation study. Data are augmented using several variations of DupER Augmentation (based on different imputation methodologies, deletion rates, and duplication rates), analyzed in BILOG-MG 3, and results are compared to those obtained from analyzing the raw data. Additional manipulated variables include test length and sample size. Estimates are compared using seven different …

What Is Method Variance And How Can We Cope With It? A Panel Discussion, Michael T. Brannick, David Chan, James M. Conway, Charles E. Lance, Paul E. Spector

Research Collection School of Social Sciences

A panel of experts describes the nature of, and remedies for, method variance. In an attempt to help the reader understand the nature of method variance, the authors describe their experiences with method variance both on the giving and the receiving ends of the editorial review process, as well as their interpretation of other reviewers’ comments. They then describe methods of data analysis and research design, which have been used for detecting and eliminating the effects of method variance. Most methods have some utility, but none prevent the researcher from making faulty inferences. The authors conclude with suggestions for resolving …

Influence Of Acculturation On Neuropsychological Assessment In Middle Easterners, Eunice E. Kwon

Loma Linda University Electronic Theses, Dissertations & Projects

Due to influx of immigrants in the United States, it has become essential in cross cultural research to consider cultural variables such as cultural orientation, cultural identity, and acculturation in order to better understand cultural influences on psychological processes and assessment outcomes (Cuellar, 1998). However, there are very few studies that have actually looked at how culture influences neuropsychological test performance (Feltcher-Janzen, Strickland, & Reynolds, 2000). Therefore, in order to better assess culturally diverse individuals and to validly interpret the findings, a conceptual model developed by Betancourt and collaborators (Betancourt & Fuentes, 2001; Betancourt, Hardin, & Manzi, 1992; Betancourt & …

Hierarchical Linear Modeling Of Drinking To Cope With Anxiety Among College Students, Bradley Wetzell, Matthew R. Pearson, James Henson

OUR Journal: ODU Undergraduate Research Journal

Previous research has assumed that drinking motives (reasons for drinking) remain fairly stable over time (traits). The current study examines how drinking motives of college students may vary over time (states). Weekly measures were completed by 125 undergraduates at Old Dominion University, which examined how average levels of anxiety interacted with anxiety coping motives to influence drinking. Using Hierarchical Linear Modeling, it was found that anxiety coping motives were less predictive for participants with elevated average anxiety levels, as opposed to participants with normal to low anxiety levels. Implications and possible explanations are discussed.

Research Mentor: Dr. James Henson, Department …

The Applicability Of The Megargee Classification System For The Mmpi-A, Joel Andrew Dillon

Psychology Theses & Dissertations

Megargee (1977) originally developed a classification system for MMPI profiles for male offenders, and eventually expanded this system to also accommodate the MMPI profiles of female offenders (Megargee, 1992). Recently Megargee expanded and modified this system for use with the MMPI-2 (Megargee, Carbonell, Bohn, and Sliger, 2001). The purpose of the current study was to examine the utility of Megargee's systems as applied to adolescents in correctional facilities based on MMPI-A results. The Megargee classification criteria were modified for the purposes of this study, generally based on quite limited modifications to accommodate the lower profile ratings typically found for adolescents …

Psychometric Properties Of The Mmpi-A Harris-Lingoes And Si Subscales In A Forensic Sample, Ashley K. Winkleman

Psychology Theses & Dissertations

The purpose of the current study was to examine the internal and external psychometric properties of the Harris-Lingoes subscales. This was accomplished by use of both self-report and caregiver-rated external criterion measures. The present study employed an archival data set consisting of 760 adolescents (470 boys and 290 girls) who completed the MMPI-A at an outpatient adolescent treatment facility as part of a court-ordered psychological evaluation. Overall, a number of subscales demonstrated good internal consistency reliability (e.g., D4 and Hy3) whereas other subscales (e.g., Pd2) demonstrated unacceptable internal consistency reliability for both genders. Correlations with external self-report scores and caregiver …

The Static-99 And Additional Research-Based Risk Factors : A Statistical Theory To Improve Sex Offender Risk Assessment, Jeffrey C. Sandler

Legacy Theses & Dissertations (2009 - 2024)

Research has indicated that adjusting Static-99 risk assessments for sexual recidivism using unguided clinical opinion reduces the accuracy of the risk assessments. While progress has been made in the last decade toward identifying which variables (both internal and external to the Static-99) are associated with the likelihood of an offender sexually recidivating, very little guidance has been given on how to consider the variables external to the Static-99 within the context of a Static-99 risk assessment. The current study proposes a statistical theory for how to incorporate certain variables into such an assessment, and provides some preliminary analyses to support …

The Influence Of Treatment Team Cohesion In The Success Of In-Home Mental Health Treatment For Children And Adolescents With Emotional And Behavioral Disorders, Jaimie C. Orndorff

Antioch University Dissertations & Theses

Background: The author pursued this area of interest due to having had a positive experience working as a therapist within a high cohesion treatment team in an in-home setting. This experience with a high cohesion team seemed to lead to more successful results than other teams that were deemed low cohesion, in the same format. This experience led to a general curiosity about why the team this author was on was more effective. Additional research allowed this author to determine the possible link between cohesion, success of treatment and reduced risk for burnout, defined as a response to chronic job …

A New Perspective On Visual Word Processing Efficiency, Joseph W. Houpt, James T. Townsend

Psychology Faculty Publications

As a fundamental part of our daily lives, visual word processing has received much attention in the psychological literature. Despite the well established perceptual advantages of word and pseudoword context using accuracy, a comparable effect using response times has been elusive. Some researchers continue to question whether the advantage due to word context is perceptual. We use the capacity coefficient, a well established, response time based measure of efficiency to provide evidence of word processing as a particularly efficient perceptual process to complement those results from the accuracy domain.

Terrorism In Australia: Myth Or Reality? A Psychometric Study Into The Western Australian Public's Perception Of Terrorism, Richard Sargent

Theses : Honours

Terrorism is not a new concept as terrorist individuals and organisations since time immemorial have used the threat of violence or actual violence to generate fear in individuals, organisations and governments alike. Fear is a powerful weapon and it is used in order to gain political, ideological or religious objectives. The attacks on the World Trade Centre and the Pentagon on the 11th September 2001 (9/11) highlighted the dangers of the inadequate intelligence, border security and immigration practices that led to this event. The attacks were a security wake up call not only for the United States of America but …

A Preliminary Study: Body Dysmorphic Disorder In Division I Women’S Collegiate Soccer Players, Tammy D. Jones

Department of Educational Administration: Dissertations, Theses, and Student Research

The prevalence of Body Dysmorphic Disorder (BDD) among collegiate athletes has not been clearly determined. The purpose of this study was to determine if there are symptoms of body dysmorphic disorder found in Division I women’s soccer players. The researcher hypothesized that there would be some symptoms found within the participants of sport and that there was a need to research this area further.

The study consisted of four participants who participated in semi-structured interviews. The subjects were asked a series of questions from the Yale-Brown Obsessive Compulsive Scale Modified for Body Dysmorphic Disorder (BDD-YBOCS) to determine if they indicated …