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Permanent link (DOI): https://doi.org/10.7939/R3J09WJ43

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Exploring Normative Eye Movement Patterns in Functional Tasks Open Access

Descriptions

Other title
Subject/Keyword
eye movement patterns
cognitive ethology
overt attention
eye-hand latency
visual processing
flow of sensory modalities in object movement
object interaction
visuomotor control
sequential object movement
visually-guided reaching
visual attention
proprioception
eye and motion tracking synchronization
eye-tracking
eye-hand coordination
functional tasks
covert attention
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Lavoie, Ewen B
Supervisor and department
Hebert, Jacqueline (Rehabilitation Medicine)
Chapman, Craig (Physical Education and Recreation)
Examining committee member and department
Maraj, Brian (Physical Education and Recreation)
Chapman, Craig (Physical Education and Recreation)
Hebert, Jacqueline (Rehabilitation Medicine)
Department
Physical Education and Recreation
Specialization

Date accepted
2017-09-01T11:06:26Z
Graduation date
2017-11:Fall 2017
Degree
Master of Science
Degree level
Master's
Abstract
When interacting with an object, humans are quite effective at navigating their hand to an object, grasping it, and acting on it. The level of ease with which we do this masks the complex interplay of sensory modalities that is occurring. This study utilizes a head-mounted eye-tracker and upper-limb motion capture markers to reveal how one of these sensory modalities, vision, enables efficient object interaction. Participants completed several trials of two tasks mimicking real-world demands. The first task involved turning and grasping a pasta box from an original position outside the participant’s field of view and placing it onto two shelves before returning it to its starting location. The second task had participants move cups filled with beads four times over a partition. Both tasks show participants spend nearly the full duration of the trial fixating on objects relevant to the task, well in advance of their hand arriving at an object. As well, participants spend little time fixating on their own hand when reaching towards an object, and slightly more time, although still very little, fixating on the object in their hand when transporting it. Instead, during a grasp, participants make a saccade from the object to its drop-off location, and hold this fixation until the object is being released by the hand. Other sensory systems, likely proprioception and haptic feedback, allow participants to behave this way. When interacting with an object outside the field of view, slight changes in this behavior occur. Specifically, participants are unable to fixate on the object as far in advance of their hand, move slightly slower, and increase their maximum grip aperture. A possible explanation for these behaviours is a predictable interaction between covert and overt attention, Dorsal and Ventral Streams of visual processing, and proprioceptive and haptic feedback that allow individuals to carry out object interactions in a smooth, cyclical manner with the eyes leading the hand.
Language
English
DOI
doi:10.7939/R3J09WJ43
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
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Last modified: 2017:11:08 18:01:15-07:00
Filename: Lavoie_Ewen_B_201708_MSc.pdf
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