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Marijuana is currently the mostly widely used illicit drug in the U.S., and has been for multiple decades (Johnston et. al., 2016). Despite a growing belief that marijuana use is not harmful, over 4 million Americans have met criteria for marijuana use disorders in the past year alone (CBHSQ, 2015). According to marijuana trajectory studies, about a third of marijuana users will end up quitting later in life, but some \u2014 such as those who meet criteria for dependence \u2014 have a much greater difficultly quitting. Therefore, by looking at marijuana users who were successful in quitting, and comparing them to ongoing adult marijuana users, factors that may assist in helping an individual quit \u2014 such as certain motivations for quitting \u2014 may be identified. To study these issues, data was collected from 507 participants from the Pittsburgh Youth Study. It was found that adolescents who used marijuana weekly for at least one year were likely to be ongoing marijuana users in adulthood and that adolescents who had a warm relationship with their primary caretaker were likely to have quit marijuana by adulthood. It was also found that Black participants were more likely to have legal, monetary, and religious reasons for quitting than were White participants. Furthermore, participants who used regularly in adolescence were likely to list legal reasons, as well as a concern that marijuana use was needed to feel normal. Finally, it was found that not a single motivation for quitting marijuana was associated with a shorter period of abstinence. The implications of these findings for motivations to quit marijuana are the focus of the discussion.
ContributorsGomez, Kira Elise (Author) / Pardini, Dustin (Thesis director) / Glenberg, Arthur (Committee member) / Meier, Madeline (Committee member) / Department of Psychology (Contributor) / School of Art (Contributor) / School of Molecular Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
This study investigates whether children who are Dual Language Learners (DLLs) and who have poor reading comprehension will benefit from participating in the EMBRACE intervention. The reading comprehension program is based on the Theory of Embodied Cognition, which focuses on the embodied nature of language comprehension. Our understanding of language is based on mental representations that we create through experiences and are integrated with according sensorimotor information. Therefore, by engaging the motor and language system through reading stories on an iPad that prompt the children to manipulate images on-screen, we might improve children's reading strategies and comprehension scores. Fifty-six children participated in reading three stories and answering related questions over a period of two weeks. Results showed that the intervention was successful in increasing reading comprehension scores in the physical manipulation condition but not in the imaginary manipulation condition. Although lower motor skill scores positively correlated with lower comprehension skills, the children's motor deficits did not moderate their performance on the intervention.
ContributorsValentin, Andrea Cristina (Author) / Glenberg, Arthur (Thesis director) / Restrepo, Maria Adelaida (Committee member) / Adams, Ashley M. (Committee member) / Department of Speech and Hearing Science (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Language comprehension is an essential skill in many aspects of life, yet some children still struggle with oral comprehension. This study examined the effectiveness of an intervention to improve the listening skills and comprehension of 4 and 5-year olds. This intervention is based on principles of embodied cognition, namely that language comprehension requires a simulation (or imagination) of what the language is about. Thus, children in the intervention condition moved pictures on an iPad to simulate the stories they were hearing. Children in the control condition saw the pictures, but did not move them. To identify the effectiveness of this simulation training, we analyzed scores on a comprehension test, and changes in motor cortex activity while listening. If the intervention increases simulation, then compared to the control, a) children given the intervention should perform better on the comprehension test, and b) those children should show greater activity in their motor cortices while listening. Furthermore, the change in motor cortex activity should statistically mediate the change in comprehension. Our results showed a significant positive correlation (.79) in the EMBRACE group (but not in the control) between the change in mu suppression before and after the intervention and the change in comprehension questions before and after the intervention. This correlation suggests that children can be taught to use their motor cortices while listening, and supports our hypothesis that embodied language theories, such as simulation are useful for enhancing comprehension.
ContributorsMarji, Michelle Lee (Author) / Glenberg, Arthur (Thesis director) / Blais, Chris (Committee member) / Restrepo, Laida (Committee member) / School of Film, Dance and Theatre (Contributor) / Department of Psychology (Contributor) / Herberger Institute for Design and the Arts (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Cannabis use has been purported to cause an amotivation-like syndrome among users. The purpose of this study was to investigate whether third party observers noticed amotivation among cannabis users. Participants in this study were 72 undergraduate university students, with a mean age of M=19.20 years old (SD=2.00). Participants nominated Informants who knew them well and these informants completed a version of the 18-item Apathy Evaluation Scale. Results indicated that more frequent cannabis use was associated with higher informant-reported levels of amotivation, even when controlling for age, sex, psychotic-like experiences, SES, alcohol use, tobacco use, other drug use, and depression symptoms (β=0.34, 95% CI: 0.04, 0.64, p=.027). A lack of motivation severe enough to be visible by a third party has the potential to have negative social impacts on individuals who use cannabis regularly.
ContributorsWhite, Makita Marie (Author) / Meier, Madeline (Thesis director) / Glenberg, Arthur (Committee member) / Pardini, Dustin (Committee member) / School of Art (Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Stress can negatively impact performance. The negative impact can be modulated through cognitive appraisals. The two types of cognitive appraisals are how people perceive a situation and have different implications for how people experience difficult, potentially stressful tasks. A threat appraisal tends to elicit negative emotions, whereas a challenge appraisal tends to elicit positive emotions. Emotions elicited from a cognitive appraisal also affect attention and were hypothesized to have different performance implications for central versus peripheral aspects of the task. Sixty-three participants recruited from a large southwestern university were randomly assigned to a threat or challenge appraisal condition. They performed a timed, stressful, novel, and complex card categorization task. Participants with the threat appraisal felt more negative emotions and perceived the task to be more stressful and difficult than participants with a threat appraisal. Performance on central aspects, peripheral aspects, and overall were not affected by appraisal.
ContributorsYang, Charles (Author) / Shiota, Michelle (Thesis director) / Glenberg, Arthur (Committee member) / Department of Information Systems (Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Dogs in animal shelters are subjected to a number of stressors during their stay, including barking which can reach 120 dB. Music has been suggested as a way to reduce this stress, however, the properties of music that result in reduced stress behavior have not been examined. An affective response to music, like that found in humans, is unlikely due to human higher cognitive function. Masking, reducing the magnitude of volume change with the presence of another sound, is one property that may be responsible for this observed stress reduction. Using white and pink noise, we examined the effects of auditory masking on stress behaviors in shelter dogs. Overall, we observed no difference in the amount of sitting, lying, head resting, or barking between the control and treatment conditions. Limitations and future directions of studies are listed.
ContributorsRedmond, Domenic Xavier Wendell (Author) / Wynne, Clive (Thesis director) / Glenberg, Arthur (Committee member) / Steele, Kenneth (Committee member) / School of Social Transformation (Contributor) / School of Life Sciences (Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Recent work in free-recall tasks suggest that human memory foraging may follow a Lévy flight distribution – a random walk procedure that is common in other activities of cognitive agents, such as animal and human food foraging. This study attempts to draw parallels between memory search and physical search, with the assumption that humans follow similar search patterns in both. To date, research merely equates the two processes (foraging in memory and the physical world) based on a similarity in statistical structure. This study starts with demonstrating a relationship between physical distance traveled and IRIs by having participants list countries. An IRI, inter-retrieval interval, is the time interval between items recalled. The next experiment uses multidimensional scaling (MDS) to derive a Euclidean perceptual space from similarity ratings of freely-recalled items and then maps the trajectory of human thought through this perceptual space. This trajectory can offer a much more compelling comparison to physical foraging behavior. Finally, a possible correlate of Lévy flight foraging is explored called critical slowing down. Statistically significant evidence was found in all three experiments. The discussion connects all three experiments and what their results mean for human memory foraging.
ContributorsGreer, Katharine Marie (Author) / Amazeen, Eric L. (Thesis director) / Glenberg, Arthur (Committee member) / Amazeen, Polemnia (Committee member) / Department of Psychology (Contributor) / School of Criminology and Criminal Justice (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Estradiol (E2) and Levonorgestrel (Levo) are two hormones commonly used in hormone therapy (HT) to decrease symptoms associated with menopause. Both of these hormones have been shown to have beneficial effects on cognition when given alone in a rodent model of menopause. However, it is unknown whether these hormones, when taken in combination, are beneficial or harmful to cognition. This is a critically important question given that these hormones are most often given in combination versus separately. This thesis is composed of two studies examining the cognitive effects of E2 and Levo using a rat model of surgical menopause. Study 1 assessed how the dose of E2 treatment in rats impacted cognitive performance, and found that low dose E2 enhanced working memory performance. Next, based on the results from Study 1, Study 2 used low dose E2 in combination with different doses of Levo to examine the cognitive effects of several E2 to Levo ratio combinations. The results from Study 2 demonstrated that the combination of low dose E2 with a high dose of Levo at a 1:2 ratio impaired cognition, and that the ratio currently used in HT, 3:1, may also negatively impact cognition. Indeed, there was a dose response effect indicating that working and reference memory performance was incrementally impaired as Levo dose increased. The findings in this thesis suggest that the E2 plus Levo combination is likely not neutral for cognitive function, and prompts further evaluation in menopausal women, as well as drug discovery research to optimize HT using highly controlled preclinical models.
ContributorsBerns-Leone, Claire Elizabeth (Co-author) / Prakapenka, Alesia (Co-author) / Pena, Veronica (Co-author) / Northup-Smith, Steven (Co-author) / Melikian, Ryan (Co-author) / Ladwig, Ducileia (Co-author) / Patel, Shruti (Co-author) / Croft, Corissa (Co-author) / Bimonte-Nelson, Heather (Thesis director) / Glenberg, Arthur (Committee member) / Conrad, Cheryl (Committee member) / School of Life Sciences (Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
This study examined the effectiveness of a Social Intelligence Intervention (SII) in improving components of social intelligence, and whether neuroticism moderates such associations in 130 participants aged 45-70. We hypothesized that the SII will improve participants' social intelligence across several factors: social awareness, social skills, social information processing, and perspective taking. Furthermore, we examined if neuroticism moderated participants' responsiveness to the intervention. Specifically, we hypothesize that individuals with high levels of neuroticism will have greater improvements in social intelligence. Individuals were randomly assigned to participate in the SII (n=71) or an attention control condition (n=59) that focused on healthy living tips. Individuals provided self-report data prior to participation in the study, and following completion of the intervention or attention control condition. The results were not statistically significant, however there was a trend for social information processing to improve with the SII. Neuroticism and time significantly moderated social awareness. This research suggests that the SII may not be effective in improving social intelligence scores for participants in midlife. Thus, the SII should be enhanced to surpass improvements that could potentially be from common factors in the intervention.
ContributorsEspinosa, Elaina Nicole (Author) / Infurna, Frank (Thesis director) / Glenberg, Arthur (Committee member) / Lemery-Chalfant, Kathryn (Committee member) / School of Film, Dance and Theatre (Contributor, Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Affluent children have been previously understudied and considerably neglected in developmental research due to the notion that they are "low risk." There is limited empirical research exploring the effects of parent involvement in affluent youth: specifically, the importance of the adolescent's perception that their mother/father do not spend as much time with them as they would like. The goals of the study were to explore the role of this dimension of perceived parental involvement in anxious-depressed symptoms, somatic symptoms, rule breaking behaviors and substance use with upper-class suburban youth. The sample was taken from the New England Study of Suburban Youth Cohort (NESSY) (Luthar & Latendresse, 2005b) consisting of 252 high school students in the 12th grade located in an affluent community in the Northeast. Results showed that the participants who indicated their fathers could have dinner with them more often if they tried presented significant group differences in anxious-depressed symptoms, somatic symptoms, and rule breaking behaviors while substance use trended towards significant. Thus, these data demonstrate that parent-child relationships are not only important for infant and child development, but are also an integral part of development of adaptive behaviors during adolescence. In addition, the data suggest the benefits from having strong, supportive, and stable relationships with not only mothers but with fathers as well. Results from post hoc analyses revealed perceived absence of fathers at dinnertime affects the adolescent more than the perceived absence of mothers at dinnertime. Finally, teens who indicated a need to spend more dinnertimes with their father may be suffering from a lack of open communication and opportunities to discuss social and emotional issues that are conducive to adolescent development and adjustment.
ContributorsOjeda, Johanna Alyssa Quiambao (Author) / Luthar, Suniya (Thesis director) / Glenberg, Arthur (Committee member) / Curlee, Alexandria (Committee member) / Sanford School of Social and Family Dynamics (Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12