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Description
Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has

Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has been mostly ignored. Characterizing the influence of arm configuration (i.e. intrinsic factors) would allow greater comprehension of sensorimotor integration and assist in interpreting exaggerated movement variability in patients. In this study, subjects were placed in a 3-D virtual reality environment and were asked to move from a starting position to one of three targets in the frontal plane with and without visual feedback of the moving limb. The alternating of visual feedback during trials increased uncertainty between the planning and execution phases. The starting limb configurations, adducted and abducted, were varied in separate blocks. Arm configurations were setup by rotating along the shoulder-hand axis to maintain endpoint position. The investigation hypothesized: 1) patterns of endpoint variability of movements would be dependent upon the starting arm configuration and 2) any differences observed would be more apparent in conditions that withheld visual feedback. The results indicated that there were differences in endpoint variability between arm configurations in both visual conditions, but differences in variability increased when visual feedback was withheld. Overall this suggests that in the presence of visual feedback, planning of movements in 3D space mostly uses coordinates that are arm configuration independent. On the other hand, without visual feedback, planning of movements in 3D space relies substantially on intrinsic coordinates.
ContributorsRahman, Qasim (Author) / Buneo, Christopher (Thesis director) / Helms Tillery, Stephen (Committee member) / Barrett, The Honors College (Contributor) / Harrington Bioengineering Program (Contributor)
Created2014-05
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Description
Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has

Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has been mostly ignored. Characterizing the influence of arm configuration (i.e. intrinsic factors) would allow greater comprehension of sensorimotor integration and assist in interpreting exaggerated movement variability in patients. In this study, subjects were placed in a 3-D virtual reality environment and were asked to move from a starting position to one of three targets in the frontal plane with and without visual feedback of the moving limb. The alternating of visual feedback during trials increased uncertainty between the planning and execution phases. The starting limb configurations, adducted and abducted, were varied in separate blocks. Arm configurations were setup by rotating along the shoulder-hand axis to maintain endpoint position. The investigation hypothesized: 1) patterns of endpoint variability of movements would be dependent upon the starting arm configuration and 2) any differences observed would be more apparent in conditions that withheld visual feedback. The results indicated that there were differences in endpoint variability between arm configurations in both visual conditions, but differences in variability increased when visual feedback was withheld. Overall this suggests that in the presence of visual feedback, planning of movements in 3D space mostly uses coordinates that are arm configuration independent. On the other hand, without visual feedback, planning of movements in 3D space relies substantially on intrinsic coordinates.
ContributorsRahman, Qasim (Author) / Buneo, Christopher (Thesis director) / Helms Tillery, Stephen (Committee member) / Barrett, The Honors College (Contributor) / Harrington Bioengineering Program (Contributor)
Created2014-05
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Description

This thesis project utilizes Bolman & Deal’s (2017) four frames to analyze how the Internship experience at TigerMountain Foundation, a South Phoenix community garden nonprofit, can be optimized to help the organization more effectively reach its goals. A brief explanation of the organizational context and structure is given as well

This thesis project utilizes Bolman & Deal’s (2017) four frames to analyze how the Internship experience at TigerMountain Foundation, a South Phoenix community garden nonprofit, can be optimized to help the organization more effectively reach its goals. A brief explanation of the organizational context and structure is given as well as an overview of the relationship between community gardening and decreasing recidivism, as well as TigerMountain’s position in a food desert. TigerMountain Foundation can ultimately be framed internally as a human resource and symbolic organization and externally as a political organization. The Internship program presents a political benefit to the organization and can benefit from some human resource and structural additions to the onboarding process and overall experience. The recommended additions include providing a thorough onboarding packet to Interns at orientation that includes a questionnaire, includes a brief overview of the organization in human resource framing, a contact sheet, and instruction sheets for commonly used systems. Other additions to the Internship experience include setting up a ratio of how many Internship hours can be earned at the gardens and farmers’ markets compared to working administratively, requesting that Interns send in their updated availability weekly for scheduling purposes, and the implementation of an “on-call” system for farmers’ market shifts.

ContributorsMason Johnston, Laurel Miranda (Author) / deLusé, Stephanie (Thesis director) / Gross, Jamesha (Committee member) / Department of Psychology (Contributor) / School of Politics and Global Studies (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
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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

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

For the past six months, I have been working with Black Lives Matter Phoenix Metro on the Tempe’s People’s Budget coalition. I served as a member on the research team as well as a temporary member of the Black Lives Matter’s nucleus leadership team. I joined weekly meetings for both

For the past six months, I have been working with Black Lives Matter Phoenix Metro on the Tempe’s People’s Budget coalition. I served as a member on the research team as well as a temporary member of the Black Lives Matter’s nucleus leadership team. I joined weekly meetings for both groups, and conducted research on city budget proposals, initiatives, and resources. I also lead discussions and conversations about progress, next steps, and goals of the coalition with over 50 volunteers within the coalition. The Tempe’s People Budget crafted a survey in late October and sent it out mid-November to members of the Tempe community, asking them what community resources they would use and which resources and investments they believed the city of Tempe should commit to. After five months of survey collection, we presented a preliminary budget proposal to Tempe’s financial office for consideration for the 2022-2023 budget, using data from 318 survey responses. With the creation of the survey among the adaption of the Tempe’s coalition, we wanted to look at what preventive community resource most respondents wanted Tempe to reinvest in. We found that the majority of survey respondents would like investments in renewable energy, housing stability, and alternatives to police. It is the city’s job to protect and serve all members of their communities, and public safety should be prioritized by investing in preventive measures instead of remedial punishments. Public safety concerns would be most effectively resolved by addressing issues such as: little to no income, housing instability, lack of access to food and water and other basic necessities to survive. Currently, Tempe is investing in the police, who most often only serve punishments.

ContributorsNelson, Phoenix (Author) / Cloutier, Scott (Thesis director) / Tekola, Sarra (Committee member) / Barrett, The Honors College (Contributor) / School of Human Evolution & Social Change (Contributor) / School of Politics and Global Studies (Contributor)
Created2022-05
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ContributorsNelson, Phoenix (Author) / Cloutier, Scott (Thesis director) / Tekola, Sarra (Committee member) / Barrett, The Honors College (Contributor) / School of Human Evolution & Social Change (Contributor)
Created2022-05
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ContributorsNelson, Phoenix (Author) / Cloutier, Scott (Thesis director) / Tekola, Sarra (Committee member) / Barrett, The Honors College (Contributor) / School of Human Evolution & Social Change (Contributor)
Created2022-05