Item response theory; Goodness-of-fit tests; Monte Carlo method
Item response theory (IRT) is expanding to diverse research settings, without accompanying access to easily implemented model fit methods. One simple model fit approach involves x2/df ratios. However, its utility is not known across several...
Phase II clinical trial are generally single arm trial where a homogeneity assumption is placed on the response. In practice, this assumption may be violated resulting in a heterogeneous response. This heterogeneous or overdispersed response can be...
This thesis is based on experimental work on electrochemically mediated charge transfer effects on Single-walled carbon nanotube bundles. The study of these effects are very important towards understanding the sensitivity of gases on nanostructures...
The phase II clinical trial is a critical step in the drug development process. In the oncology setting, phase II studies typically evaluate one primary endpoint, which is efficacy. In practice, a binary measurement representing the response to the...
This thesis looks at the optimization of fluid flow and mass transfer using computational fluid dynamics (CFD) in a micro fluidic coulter counter. CFD will be used to solve equations of fluid flow and mass transfer to see how molecules within the...
College dropouts--Indiana; Educational attainment--Indiana; College freshmen--Indiana; Community college students--Indiana
The purpose of this exploratory study was to determine if student background variables (age, gender, race, academic preparation); student status (part/full-time student), and student circumstances (commuting distance, independent/dependent...
Older people--Mental health; Rural health; Urban health
Depression is one of the most prevalent psychiatric conditions experienced by older adults and represents a major public health concern. Rural/urban residence may affect the prevalence of depression as rural older adults differ from their urban...
Older people--Mental health; Philosophy of mind; Cognitive science--Health aspects
Declines in social resources and in the quality of interpersonal interactions have been observed in some older adults. Unawareness of ability is a clinical problem that has been found in some older adults with dementia, but has also been found in...
Data from the Health and Retirement Study (HRS) were used to examine factors that influence emotional distress in older adults with cancer, arid to learn whether these distress trajectories are different from older adults without cancer. The model...
A common research interest in medical, biological, and engineering research is determining whether certain independent variables are correlated with the survival or failure times. Standard statistical techniques cannot usually be applied for...
Self-efficacy; Psychological abuse; Identity (Psychology); Women college students--Mental health
The current research proposed that psychological abuse within an intimate relationship erodes one's self-efficacy and aimed to demonstrate a negative relationship between past psychological abuse and how one reacts to a challenge. It was...
The current study investigated the nature of anticipatory grief in a sample of dementia caregivers, and examined the relationship between anticipatory grief and caregiver burden. Anticipatory grief can be described as one's reaction to the...
Self-control in children; Crime and race; Parent and teenager; Teenagers--Family relationships
This study seeks to examine whether racial disparities in offending can be explained through self-control theory. The study utilized longitudinal responses of a nationally representative sample of 1700 adolescents. Parenting and self-control...
Distance education; College dropouts--Prevention; College attendance
The purpose of this exploratory study was to identify which factors predict persistence among a sample of distance education students. Age, gender, GPA, computer experience, computer self-efficacy, and gender role were examined in relation to...
African American families--Mental health; Parenting--Psychological aspects; Anxiety
To investigate the effects of anxiety and ethnicity on parental control as well as the effects ethnicity, anxiety, and parental control have on child diagnostic severity, anxious African American and Caucasian families were compared. Sixty-nine...
African American men--Mental health; Depression in men; Depression, Mental--Social aspects
Background: In any given year depression affects as many as 121 million people worldwide and 20 percent or 19 million people in the U.S. suffer from at least one episode of depression during their lifetime. In the U.S., depression has a substantial...
DNA microarrays--Statistical methods; Gene expression--Statistical methods
Data derived from gene expression microarrays are frequently used to identify candidate genes which can characterize and distinguish between two biological phenotypes. A key step in this process is the selection of an appropriate test statistic to...
Motivation (Psychology); Psychology and religion; Faith--Psychology
Religious motivation is a construct that has been the focus of decades of research. The "Religious Orientation Scale" (ROS) and variations of it, including the "Age Universal Intrinsic-Extrinsic Scale-12" (AUIES-12), are the...
This dissertation is a post-test only comparison group study. It tests the effects of additional Motivational Interviewing sessions during the first two weeks in an intensive outpatient clinic. The object is to learn whether these additional...
Student evaluation of teachers; College teachers--Rating of; College students--Attitudes; Teacher-student relationships
This dissertation explored the relationship between student, course, and
instructor-level variables and student course ratings. The selection of predictor variables
was based on a thorough review of the extensive body of existing literature on...
