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- Creators: Glenberg, Arthur
Description
Introduction: Depression is one of the most prevalent mental illnesses in the United States, and is characterized by feeling sad or empty most of the day, nearly every day (American Psychiatric Association, 2013). The experience of childhood trauma is one of many factors that may lead to depression, while trauma can also yield other adverse life outcomes, such as alcohol-related consequences (Felitti et al., 2001; Neumann, 2017). One of the specific aims of this investigation was to examine the direct influences of childhood trauma on depression. We also examined selected direct and indirect influences of childhood trauma on drinking outcomes through the potential mediating mechanism of depression. We examined three distinct drinking outcomes, 1) impaired control over drinking (i.e. the inability to stop drinking when intended), 2) heavy episodic drinking (four or more drinks on one occasion for men, four or more for women), and 3) alcohol-related problems. Methods: A survey was administered to 940 (466 women, 474 men) university students. Structural equation modeling was used to examine the data. Potential two- and three-path mediated effects were examined with the bias corrected bootstrap technique in Mplus (MacKinnon, 2008). Results: Emotional abuse was found to be positively associated with depression. In contrast, having an emotionally supportive family was found to be negatively associated with depression. Congruent with the Self-Medication Hypothesis, depression was found to be positively associated with impaired control over drinking. Physical neglect was found to be positively associated with impaired control. Lastly, emotional abuse was found to be indirectly linked to increased heavy episodic drinking and alcohol-related problems through depression and impaired control.
ContributorsBobel, Emily Rebecca Leslie (Author) / Patock-Peckham, Julie (Thesis director) / Glenberg, Arthur (Committee member) / Karoly, Paul (Committee member) / Department of Psychology (Contributor) / School of Criminology and Criminal Justice (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12
Description
Recent research on alcohol use among LGB young adults indicates that sexual minority youth are at increased risk relative to their heterosexual peers. One possible contributing factor is that religiosity fails to provide the significant protection for LGB youth that it has been demonstrated to provide in general population samples. Although recent studies provide some support for this hypothesis, there is little research seeking to understand the reasons that religiosity may fail to protect against heavy drinking among LGB youth. The current study attempted to address this gap by examining relations among religiosity, age of self-identification, and alcohol use in a sample of 103 young adults self identified as lesbian, gay, or bisexual. Using multiple regression, we found that religiosity had an indirect effect on alcohol use operating through age of identification as LGB. Higher religiosity was associated with a later age of self-identification, which in turn, predicted greater increases in alcohol use among LGB youth during the transition from high school through college. Exploratory analyses found that gender significantly moderated the influence of age of self-identification on alcohol use such that a later age of self-identification was a risk factor for increased drinking for women, but not for men. The findings have important implications for understanding complex relations between religiosity and alcohol use among LGB youth. In addition, the findings may inform the development of religious support groups for LGB youth that will allow them to experience the benefits of religious involvement that heterosexual youth experience.
ContributorsOng, Thai Quang (Author) / Corbin, William (Thesis director) / Glenberg, Arthur (Committee member) / Grzanka, Patrick (Committee member) / Barrett, The Honors College (Contributor) / T. Denny Sanford School of Social and Family Dynamics (Contributor) / Department of Psychology (Contributor)
Created2013-12
Description
Polysubstance abuse is far more common than single substance abuse. One of the most widely abused, yet greatly understudied combination of drugs is the simultaneous use of methamphetamine (meth) and alcohol. Because little research has been conducted on the co-abuse of meth and alcohol, it is important to study the behavioral and neural mechanisms underlying the use of both to combat addiction and come closer to finding an effective treatment of this form of drug abuse. This study uses a rodent model to attempt to identify the mechanisms underlying this co-abuse through the stimulation of the medial forebrain bundle (MFB) and thus the activation of the mesocorticolimbic pathway, the brain's pleasure circuit. First, self-stimulation thresholds (the lowest electrical current the rats are willing to respond for) were determined using a process called Discrete Trials Training. This threshold was later used as a baseline measure to reference when the rats were administered the drugs of abuse: meth and alcohol, both alone and in combination. Our overall results did not show any significant effects of combining alcohol and meth relative to the effects of either drug alone, although subject attrition may have resulted in sample sizes that were statistically underpowered. The results of this and future studies will help provide a clearer understanding of the neural mechanisms underlying the polyabuse of meth and alcohol and can potentially lead to more successfully combating and treating this addiction.
ContributorsDrafton, Kaitlyn Marie (Author) / Olive, Foster (Thesis director) / Glenberg, Arthur (Committee member) / Sanford School of Social and Family Dynamics (Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
The premise of the embodied cognition hypothesis is that cognitive processes require emotion, sensory, and motor systems in the brain, rather than using arbitrary symbols divorced from sensorimotor systems. The hypothesis explains many of the mechanisms of mental simulation or imagination and how they facilitate comprehension of concepts. Some forms of embodied processing can be measured using electroencephalography (EEG), in a particular waveform known as the mu rhythm (8-13 Hz) in the sensorimotor cortex of the brain. Power in the mu band is suppressed (or de-synchronized) when an individual performs an action, as well as when the individual imagines performing the action, thus mu suppression measures embodied imagination. An important question however is whether the sensorimotor cortex involvement while reading, as measured by mu suppression, is part of the comprehension of what is read or if it is arises after comprehension has taken place. To answer this question, participants first took the Gates-MacGinitie reading comprehension test. Then, mu-suppression was measured while participants read experimental materials. The degree of mu-suppression while reading verbs correlated .45 with their score on the Gates-MacGinitie test. This correlation strongly suggests that the sensorimotor system involvement while reading action sentences is part of the comprehension process rather than being an aftereffect.
ContributorsMarino, Annette Webb (Author) / Glenberg, Arthur (Thesis director) / Presson, Clark (Committee member) / Blais, Chris (Committee member) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
Motor learning is the process of improving task execution according to some measure of performance. This can be divided into skill learning, a model-free process, and adaptation, a model-based process. Prior studies have indicated that adaptation results from two complementary learning systems with parallel organization. This report attempted to answer the question of whether a similar interaction leads to savings, a model-free process that is described as faster relearning when experiencing something familiar. This was tested in a two-week reaching task conducted on a robotic arm capable of perturbing movements. The task was designed so that the two sessions differed in their history of errors. By measuring the change in the learning rate, the savings was determined at various points. The results showed that the history of errors successfully modulated savings. Thus, this supports the notion that the two complementary systems interact to develop savings. Additionally, this report was part of a larger study that will explore the organizational structure of the complementary systems as well as the neural basis of this motor learning.
ContributorsRuta, Michael (Author) / Santello, Marco (Thesis director) / Blais, Chris (Committee member) / School of Mathematical and Statistical Sciences (Contributor) / School of Molecular Sciences (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
Description
Ecological modeling can be used to analyze health risk behaviors and their relationship to ecological factors, which is useful in determining how social environmental factors influence an individual’s decisions. Environmental interactions shape the way that humans behave throughout the day, either through observation, action, or consequences. Specifically, health risk behaviors can be analyzed in relation to ecological factors. Alcohol drinking among college students has been a long concern and there are many risks associated with these behaviors in this population. Consistent engagement in health risk behaviors as a college student, such as drinking and smoking, can pose a much larger issues later in life and can lead to many different health problems. A research study was conducted in the form of a 27 question survey to determine and evaluate the impact of ecological factors on drinking and smoking behaviors among Arizona State University students. Ecological factors such as demographics, living conditions, contexts of social interactions, and places where students spend most of their time were used to evaluate the relationship between drinking and smoking behaviors and the ecological factors, both on- and off- campus. The sample size of this study is 541 students. Statistical tests were conducted using Excel and RStudio to find relationships between patterns of health risk behaviors and various ecological factors. The data from the survey was analyzed to address three main questions. The first question analyzed drinking behaviors in relation to demographics, specifically gender and race. The second question assessed drinking behaviors with participation in Greek life and clubs on campus. The third question evaluated the relationship between health risk behaviors and students’ living conditions, such as living on or off campus. The results show that while gender does not have a statistically significant influence on drinking behaviors, race does. White individuals are more likely to engage in drinking behaviors and are more at risk than non-whites. Participation in Greek life was shown to be statistically significant in determining health risk behaviors, while involvement in clubs was not. Finally, on campus students are less likely to engage in health risk behaviors than off-campus students.
ContributorsWerbick, Meghan Lindsay (Co-author) / Andrade, Amber (Co-author) / Naik, Sparshee (Co-author) / Mubayi, Anuj (Thesis director) / Gaughan, Monica (Committee member) / School of Human Evolution & Social Change (Contributor, Contributor) / School of Politics and Global Studies (Contributor, Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05