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An in depth evaluation of internal criteria for determining the number of clusters in a data set
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Clustering procedures partition data sets into groups, minimizing the distance within clusters while maximizing the distance between clusters. Clustering can be a powerful tool...
Associations between psychosis risk and emotional distress disorders with cortical surface morphometry
(University of Missouri--Columbia, 2020)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI-COLUMBIA AT REQUEST OF AUTHOR.] Neuroimaging studies have consistently found structural cortical abnormalities in schizophrenia, especially in structural hubs. However, it is unclear what...
Psychosis risk is associated with decreased white matter integrity in corticostriatal tracts
(University of Missouri--Columbia, 2018)
Psychosis is associated with increased striatal dopamine and it is thought that altered connectivity between the striatum and the cortex could contribute to psychosis. In particular, there is theory and research linking ...
Event-history mediator models of college attrition: risk goups and risk factors
(University of Missouri--Columbia, 2007)
estimated the effects of a number of factors on college attrition, in 3,290 FGEN and non-FGEN students over four years, using event-history analysis. Results showed that, FGEN students were indeed more likely to leave college than their non-FGEN peers...
Ambulatory assessment of physical pain, emotional distress, and alcohol use
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The available research suggests that many individuals with chronic pain drink alcohol to manage their pain. However, few studies have examined the association of alcohol and pain...
Gene-environment interaction in alcohol problems in emerging and young adulthood : the DRD4 VNTR, DAT1 VNTR, and 5-HTTLPR polymorphisms
(University of Missouri--Columbia, 2009)
Alcohol problems at different developmental stages are associated with different genetic and environmental factors. Taking a developmentally sensitive approach, the current study characterized interaction effects between ...
A hierarchical Bayesian analysis of multiple order constraints in behavioral science
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Psychology is an empirical science, and oftentimes the main target of interest is an empirical effect. For example, we may be interested in human perception and ask participants...
A transdiagnostic investigation of amygdala-vmPFC resting state functional connectivity and emotional distress in daily lives
(University of Missouri--Columbia, 2018)
Mood disorders, anxiety disorders and borderline personality disorder overlap in symptom criteria, are highly comorbid with one another, and group together in factor models of psychopathology (Kotov et al., 2011). These ...
The impact of gender and traditional norm adherence on event-level alcohol outcomes
(University of Missouri--Columbia, 2021)
whether these differences are attributable to a number of factors that differ between men and women, including biological differences, personality traits, mood, and drinking motives. Multiple studies (McCreary et al., 1999; Neve et al., 1997) have...
Alcohol consumption, executive function and risky decision making
(University of Missouri--Columbia, 2009)
Previous research has shown that alcohol intoxication can adversely affect behavior by impairing higher cognitive function (e.g., Giancola, 2000) and can lead to increased risk-taking (Leigh, 1999) via impaired executive ...
Short and long-term effects of birth weight and neonatal medical complications on children's emotional and behavioral outcomes
(University of Missouri--Columbia, 2008)
Research consistently indicates that children born low birth weight are at increased risk for poor adjustment outcomes throughout development. Despite a relatively large literature, the mechanisms accounting for the ...
Maintaining cross-domain objects and features in working memory : implications for storage in models of working memory
(University of Missouri--Columbia, 2007)
A great deal of evidence, both from behavioral studies of cross-domain interference and from neuroimaging, suggests the need for a domain-general store in models of working memory. Baddeley included such a store in an ...
Broadening the perspective on employee absenteeism : the effects of work group and nonwork factors
(University of Missouri--Columbia, 2009)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The present study examined employee absenteeism in relation to variables new to absenteeism literature while addressing several methodological issues highlighted...
Boundary conditions for a visual working memory capacity model
(University of Missouri--Columbia, 2009)
Cowan's K (Cowan, 2001) is an effective measure of visual working memory capacity and has been widely accepted by working memory researchers in recent years. However, one fundamental assumption of this measure, so called ...
Assessing single- and dual-process accounts of recognition memory using hierarchical Bayesian models
(University of Missouri--Columbia, 2010)
Recognition memory refers to a person's ability to recognize something that has been previously encountered. For several decades recognition memory has been thought to be governed by a single process whereby the strength ...
The relationship between cortisol and social stress in late adolescent girls' friendships
(University of Missouri--Columbia, 2007)
The potential mechanisms linking early experience and temperament to coping with common peer dynamics and the stress hormone cortisol were explored for young women in two studies. Girls and women typically use friendships, ...
Disentangling alcohol-specific alcohol use disorder criteria from externalizing psychopathology using an empirically driven approach
(University of Missouri--Columbia, 2020)
Within current mental disorder classification systems, alcohol use disorder (AUD) and psychopathology, more broadly, are conceptualized as distinct categorical disorders. Recent classification research has focused on ...
The effects of tetrahydrobiopterin (BH4) treatement on nonverbal working memory-related brain activations and connectivity in individuals with phenylketonuria
(University of Missouri--Columbia, 2016)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Previous research suggests that phenylketonuria (PKU) is associated with disruptions in structural and functional connectivity that may contribute to impairments in working...
Examining bidirectional associations between momentary impulsivity, alcohol consumption, and daily life contexts
(University of Missouri--Columbia, 2020)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI--COLUMBIA AT REQUEST OF AUTHOR.] Longitudinal, cross sectional, and laboratory studies have examined the relationships between impulsivity and alcohol use. However, most studies so far have...
Common and specific alcohol risk factors in African Americans and Caucasians
(University of Missouri--Columbia, 2010)
Considerable research evidence shows that the alcoholism risk process differs for African Americans and Caucasians (Bachman et al., 1991; Wallace et al., 2003). The current study was designed to test a model examining ...