Mohammed, Ajmal (2023) Mobility in People with Hemianopia: Effect of Dual Tasking on Walking Speed and Scanning Behavior. Bachelor thesis, Psychology.
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Abstract
Introduction: Homonymous hemianopia is a visual field defect characterized by a loss of vision on one side of the visual field in both eyes. These people have difficulty detecting objects in their blind hemifield while walking, which might be amplified during dual tasking due to inadequate scanning behavior. This study aims to assess the influence of dual tasking on scanning behavior, walking speed and detection performance in people with and without hemianopia. Methods: A single task, an attentional dual task, and cognitive dual task were used to assess the influence of dual tasking on scanning behavior in seventeen people with hemianopia and seventeen people with normal vision. The single task consisted of identifying targets. Attentional dual task consisted of walking through a cone while identifying targets and avoiding a confederate. Cognitive dual task required participants to identify targets and take the digit span backwards test. An eye tracker was used to record scanning behavior. We examined differences in walking speed, detection performance and scanning behavior (i.e., saccadic exploration, saccadic amplitude, and dispersion of scans) between tasks and groups. Results: People with normal vision walked slower in the cognitive dual task condition than in the attentional dual task condition, while those with hemianopia showed no difference in their walking speed. A significant negative effect of dual tasking was found on scanning behavior and walking speed, but not on detection performance. Conclusion: Future rehabilitation can supplement compensatory scanning training with dual task training to attenuate the negative impact of dual tasking on scanning behavior. People with hemianopia can be trained to make larger saccades during dual tasking to enhance scanning behavior.
| Item Type: | Thesis (Bachelor) |
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| Supervisor name: | Postuma, E.M.J.L. |
| Degree programme: | Psychology |
| Differentiation route: | None [Bachelor Psychology] |
| Date Deposited: | 04 Aug 2023 09:31 |
| Last Modified: | 04 Aug 2023 09:31 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/2722 |
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