Impact of actual and self-perceived body type on visual perception of distances
| dc.contributor.author | Branan, Matthew, author | |
| dc.contributor.author | Turk, Phil, advisor | |
| dc.contributor.author | Witt, Jessica, committee member | |
| dc.contributor.author | Hess, Ann, committee member | |
| dc.date.accessioned | 2015-08-27T03:57:08Z | |
| dc.date.available | 2015-08-27T03:57:08Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | We investigate several questions regarding the proposition that physical body size and one's image of their own body type affect the ability to make accurate judgements of distances. Data collected include subjects' guesses of distances of four cones set 10, 15, 20, and 25 meters away and the weight, BMI, and self-perception of body image for each of 67 subjects. Interest lies in determining the covariates that are most important in explaining one's ability to accurately judge distances and whether weight or BMI is the better explainer among the physical body size predictors. We utilize linear mixed models to account for correlation among each subjects' own distance guesses and to allow for flexible modeling of subject-specific effects. Flexibility is further promoted through use of model averaging techniques to account for model selection uncertainty inherent in typical approaches in which an analyst selects only one model from which inferences are made. A generalization of the coefficient of determination from ordinary linear models is made to the linear mixed model setting (R²LMM) in order to provide an additional goodness measure for fixed effects and for individual fixed effects themselves. Baseline differences among subjects' ability to accurately judge distances are so vast that extracting the importance of the fixed effects becomes difficult. It is found that body size is a significant predictor of subjects' ability to accurately judge distances but body image is not at the 0.05 significance level. We recommend choosing weight over BMI as a predictor of guessing behavior based on information criteria, model averaging, and the generalized R²LMM. Specifically, heavier individuals tend to guess more accurately. | |
| dc.format.medium | born digital | |
| dc.format.medium | masters theses | |
| dc.identifier | Branan_colostate_0053N_12908.pdf | |
| dc.identifier.uri | http://hdl.handle.net/10217/166945 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation.ispartof | 2000-2019 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject | linear mixed model | |
| dc.subject | robust linear mixed model | |
| dc.subject | generalized R squared | |
| dc.subject | self-perception | |
| dc.subject | model averaging | |
| dc.title | Impact of actual and self-perceived body type on visual perception of distances | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). | |
| thesis.degree.discipline | Statistics | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Science (M.S.) |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- Branan_colostate_0053N_12908.pdf
- Size:
- 564.12 KB
- Format:
- Adobe Portable Document Format