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Remembering complex objects in visual working memory
(University of Missouri--Columbia, 2013)
Visual working memory stores stimuli from our environment as representations that can be accessed by high-level control processes. This study addresses a longstanding debate in the literature about whether storage limits ...
Masking variables in mixture modeling
(University of Missouri--Columbia, 2013)
Finite normal mixture modeling is a popular technique for clustering individuals into distinct subpopulations. A characteristic of mixture modeling that researchers may be unaware of is its tendency to arrive at locally, ...
Classification problems in growth mixture modeling
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Growth mixture modeling can be used for two purposes: 1) to identify mixtures of normal sub-groups, and 2) to approximate oddly shaped distributions ...
The nature of time-based forgetting in immediate memory
(University of Missouri--Columbia, 2013)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The existence of time-based forgetting has been a controversial topic almost as long as memory has been investigated. In recent years there have been ...
Cohen's kappa as a method for link prediction
(University of Missouri--Columbia, 2013)
As network data gains popularity for research in various fields, the need for methods to predict future links or find missing links in the data has increased. One subset of the methodology used to solve this problem involves ...
Bayesian random intercept slope factor model for longitudinal twin data
(University of Missouri--Columbia, 2013)
The Random Intercept (RI) factor model is proposed as an alternative to traditional genetic factor models for the analysis of longitudinal twin data. This model constitutes a more factorially complex alternative to the ...
Drinking in real life as an example of how expectations color experiences
(University of Missouri--Columbia, 2014)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Drinkers report using alcohol when experiencing negative emotions, e.g., "to feel numb" or escape and also in times of celebration, e.g., "to get high" ...
Positive affect, intuitive processing, and visual encoding
(University of Missouri--Columbia, 2012)
The effects of positive affect (PA) on cognitive outcomes have been studied extensively. These effects map on squarely to a Cognitive-Experiential Self Theory (CEST) framework (Epstein, 1991; 1994). One component of CEST ...
Effects of a metabotropic glutamate receptor 5 positive allosteric modulator, CDPPB, on spatial learning in rodents
(University of Missouri--Columbia, 2012)
Metabotropic glutamate receptor 5 (mGlu5) has been implicated in a variety of learning processes and is important for aversive learning tasks. The present studies used an mGlu5 receptor positive allosteric modulator, ...
Genetic and environmental influences on impulsivity and coping motives for alcohol across emerging and young adulthood
(University of Missouri--Columbia, 2013)
Variation in the gene encoding the dopamine D4 receptor (DRD4) may moderate the influence of environments (i.e., a gene-environment interaction, GXE) on personality traits and motives associated with alcohol use disorders. ...
The effect of mGluR2 3 agonist, LY379268, and a mGluR4 positive allosteric modulator, VU0155041, on conditioned taste aversion
(University of Missouri--Columbia, 2013)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Metabotropic glutamate (mGlu) receptors are known to mediate learning and memory. Although evidence indicates a role for mGlu receptors (e.g., mGlu5) ...
The origin of working memory deficits in Parkinson's disease
(University of Missouri--Columbia, 2012)
Two experiments were conducted to examine the mechanisms underlying deficits of visual working memory in Parkinson's disease (PD). One study combined behavioral methods with event-related potentials (ERPs), the other, ...
EGCG and voluntary exercise : an examination of treatment effects using the TgCRND8 mouse model of Alzheimer's disease
(University of Missouri--Columbia, 2013)
Previous work with the TgCRND8 mouse model of Alzheimer's disease has shown that voluntary exercise implemented for long time periods (5-months) and starting at very young ages (1-month), prior to the development of disease ...
Six- and ten-month-old infants' intermodal representation of numerical ratios
([University of Missouri--Columbia], 2014)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The abilities to represent and process quantity information exist across many animal species and are evident early in the life of individuals. Preverbal ...
Experience, awareness, and regulation of mixed emotions
([University of Missouri--Columbia], 2014)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Literature on relationships of emotions to psychological adjustment has mainly focused on unitarily valenced affect (i.e., positive or negative emotions). ...
Can 16-month-old infants make transitive inferences?
(University of Missouri--Columbia, 2010)
Researchers have long been interested in the emergence of transitivity (e.g., if A>B and B>C, then A>C). However, it is not clear at what age children start to make transitive inferences successfully. In addition, nonhuman ...
Affective modulation of post-auricular reflexes to serial probes : a test of the nursing hypothesis
(University of Missouri--Columbia, 2015)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The post-auricular reflex (PAR) is a vestigial microreflex which is thought to be a component of startle. However, unlike prototypical components of ...
Genetic influences on non-suicidal self-injury and suicidal thoughts and behaviors
(University of Missouri--Columbia, 2015)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Though non-suicidal self-injury (NSSI) and suicidal thoughts and behaviors (STBs) often co-occur, very little is known about the shared and unique ...
Methamphetamine-induced hyperactivity and reinforcement learning in rats selectively bred for high and low voluntary running
(University of Missouri--Columbia, 2015)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The goal of the present research was to assess two lines of Wistar rats selectively bred for high (HVR) and low (LVR) voluntary wheel running, in ...
Examination of mu-Opioid Receptor Activation in the Nucleus Accumbens on Baseline Diet Preferences in Rats Selectively Bred to Run Long or Short Distances
(University of Missouri--Columbia, 2015)
The obesity epidemic and associated diseases are a direct result of both diet choice and inactivity, as overconsumption of palatable foods and a sedentary lifestyle invariably precede the onset of weight gain. Our laboratory ...