Barrett, The Honors College Thesis/Creative Project Collection
Barrett, The Honors College at Arizona State University proudly showcases the work of undergraduate honors students by sharing this collection exclusively with the ASU community.
Barrett accepts high performing, academically engaged undergraduate students and works with them in collaboration with all of the other academic units at Arizona State University. All Barrett students complete a thesis or creative project which is an opportunity to explore an intellectual interest and produce an original piece of scholarly research. The thesis or creative project is supervised and defended in front of a faculty committee. Students are able to engage with professors who are nationally recognized in their fields and committed to working with honors students. Completing a Barrett thesis or creative project is an opportunity for undergraduate honors students to contribute to the ASU academic community in a meaningful way.
Filtering by
- All Subjects: Aging
- Creators: School of Life Sciences
The aim of this study was to explore cross-sectional and longitudinal aging differences in immediate and delayed visual and verbal memory abilities in individuals with Autism Spectrum Disorder (ASD) compared with neurotypicals (NTs). We measured hippocampal size, fornix fractional anisotropy (FA), and hippocampal and fornix freewater to understand how aging impacts memory structures. Longitudinal findings highlight vulnerabilities in immediate verbal memory and hippocampal volume, while cross-sectional findings indicate fornix freewater may increase at a faster rate in adults with ASD. Future research will examine cognitive and structural sex differences and will study how cognitive measures correlate with structural measures.
Elective cosmetic surgery has grown more popular in the last several decades, including procedures specifically targeted at older adults and anti-aging. The aim of this study is to better understand elective cosmetic surgery rationale for older adults. The first part of the study summarizes literature on elective cosmetic surgery for older adults and determines what factors influence the desire for elective cosmetic procedures. From the research databases PubMed, JSTOR, and ScienceDirect, eighteen sources were referenced in the final review. The review found that there are differences in sociocultural views of men and women as they age as well as internal views of aging. The modest number of studies used in the literature review reflect a current gap in current research studying elective cosmetic surgery in older adults. For the second part of the study, data was collected from a 2018 survey designed to better understand aging, body image, and subjective age. The survey was limited to individuals living in the United States aged 40 and above and was deployed through MTurk (Mechanical Turk). A total of 1199 responses were received. Only participants 55 years and above are included for the purpose of this study. Most participants who answered the question for elective cosmetic surgery rationale answered that their primary rationale is to reduce age-related physical markers. For participants identifying as female, nine percent cited self-esteem as their rationale while no male-identifying participants responded similarly. Future research can include questions on internal and external factors older adults feel have the greatest impact on their decision to have elective cosmetic procedures.
Objective: This research intended to characterize the influence of sex and age on social cognition in adults with ASD using an adult sample. We hypothesized Reading the Mind in the Eyes (RME) scores would be lower in adults with ASD, with a stronger relationship between decreasing performance aging effects compared to NTs. Additionally, we hypothesized deficits would be more severe in in males with ASD compared to females with ASD.
Methods: The RME task was administered to 181 adults to quantify ToM abilities. The participants consisted of 100 adults with ASD (69 males, 32 females; age range: 18-71, mean=39.45±1.613) and matched 81 NT adults (47 males, 34 females; age range: 18-70, mean=41.51±1.883). Multiple regression analyses examined interactions between diagnosis and age, diagnosis and sex, and diagnosis by age by sex. Exploratory within group analyses assessed 1) sex differences using ANCOVA, and 2) associations with age using Pearson correlation in SPSS.
Results: We found that NT adults performed better on the RME task than adults with ASD. Worse performance on the RME task correlated with greater age for the NT, but not ASD. Additionally, no influence of sex on RME scores was identified.
Discussion: These results are consistent with other studies indicate social cognition deficits in adults with ASD compared to NT adults. Additionally, we replicated findings that suggest ToM performance declines with age in NT adults. Fewer social relationships, smaller social networks, and reduced social engagement have been associated with aging in both NTs and individuals with ASD (Pratt & Norris, 1994). However, our cross-sectional sample suggests ToM abilities may not decline with age in adults with ASD as hypothesized. Longitudinal studies are needed to corroborate these findings. Further developments in this line of research may inform novel interventions tailored toward the growing population of adults with ASD. Ultimately, our research aims to improve quality of life across the lifespan for an already vulnerable population.
Methods: The study consisted of 79 participants with ASD (59 male, 20 female; ages 18-70, mean=40.27 [±17] years) and 77 NT participants (46 male, 31 female; ages 18-71, mean=40.33 [±16] years). Hippocampal and fornix FW and FA values were generated from diffusion tensor images obtained along 32 directions using a b-value of 2500 s/mm2 in the axial direction with 3 mm slice resolution. These images were then processed for eddy current, distortion, b-vec and motion correction, skull stripped, and non-linear registered using Advanced Normalization Tools (ANTs) to the subject’s T1 image. FW and FA maps were calculated using custom written MatLab code and standard atlases containing the hippocampus and fornix were applied.
Results: The right hippocampus showed a significant diagnosis by age interaction (p=0.018), such that the increase in FW with age was greater for adults with ASD. The left hippocampus diagnosis by age interaction approached significance (p=0.055). Similarly, the right fornix showed a significant diagnosis by age interaction (p=0.044), with increases in FW with age as greater for adults with ASD, and the left fornix diagnosis by age interaction approached significance (p=0.053). FA values showed no significant diagnosis by age interactions.
Conclusion: In the hippocampus and fornix, the association between increasing FW and increasing age was more pronounced for adults with ASD than matched NT adults. This may mean that as adults with ASD age, these regions will degenerate faster than their NT peers, which could have implications for accelerated age-related memory decline. However, a notable limitation is the cross-sectional nature of the study. Our ongoing longitudinal study will inform a more definitive picture of brain aging with ASD.
Age is the most significant risk factor for cancer development in humans. The somatic mutation theory postulates that the accumulation of genomic mutations over time results in cellular function degradation which plays an important role in understanding aging and cancer development. Specifically, degradation of the mechanisms that underlie somatic maintenance can occur due to decreased immune cell function and genomic responses to DNA damage. Research has shown that this degradation can lead to the accumulation of mutations that can cause cancer in humans. Despite recent advances in our understanding of cancer in non-human species, how this risk factor translates across species is poorly characterized. Here, we analyze a veterinarian cancer dataset of 4,178 animals to investigate if age related cancer prevalence is similar in non-human animals. We intend for this work to be used as a primary step towards understanding the potential overlap and/or uniqueness between human and non-human cancer risk factors. This study can be used to better understand cancer development and how evolutionary processes have shaped somatic maintenance across species.