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The Effects of Task Difficulty and V...

Watson, Kristen.

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The Effects of Task Difficulty and Vision during Dual-Motor Tasking on Gait in Young and Older Healthy Adults.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The Effects of Task Difficulty and Vision during Dual-Motor Tasking on Gait in Young and Older Healthy Adults./
Author:	Watson, Kristen.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	73 p.
Notes:	Source: Masters Abstracts International, Volume: 56-06.
Contained By:	Masters Abstracts International56-06(E).
Subject:	Biomechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10271167
ISBN:	9780355114782

The Effects of Task Difficulty and Vision during Dual-Motor Tasking on Gait in Young and Older Healthy Adults.
Watson, Kristen.

The Effects of Task Difficulty and Vision during Dual-Motor Tasking on Gait in Young and Older Healthy Adults. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 73 p.

Source: Masters Abstracts International, Volume: 56-06.

Thesis (M.S.)--University of Nebraska at Omaha, 2017.

The overall purpose of this study was to investigate the effect of task difficulty and vision during dual-motor tasking on gait variability in younger and older healthy adults. A total of 23 people participated in this study:15 younger adults (Sex: 5 males, 10 females; Age: 20.6(1.96) years; Body Mass: 64.98(12.78) kilograms; Height: 1.67(0.09) meters) and 8 older adults (Sex: 3 males, 5 females; Age: 70.0(4.07) years; Body Mass 73.43(18.2) kilograms; Height 1.7(0.11) meters). Subjects underwent a series of dual-motor task conditions where the opaqueness of the tray (vision) and the presence of water glasses on top (task difficulty) was varied while walking on a self-paced treadmill. Step width, step time, step length, speed, secondary task performance, and vision variables were calculated from each trial by using mean, standard deviation, coefficient of variation, sample entropy, and recurrence quantification analysis. Increasing task difficulty caused step length and step time to become more periodic and repeatable for both groups. The effect of vision on gait variability caused increased step width variability in the opaque tray conditions, older adults showing more variability than younger adults. Step time became more periodic during these conditions for both groups as well. Speed variability was increased as task difficulty and vision was increased throughout trials. The effect of task prioritization was studied by giving instructions of which task to focus on. Prioritizing the secondary task caused a decreased step length but increased step time variability. Older adults presented with longer maxline lengths indicating a more periodic, recurrent pattern for all gait spatiotemporal variables. Both groups looked down for longer during he prioritization of secondary task condition as compared to prioritizing walking. Younger adults also used their vision more to perform the dual-task compared to older adults.

ISBN: 9780355114782Subjects--Topical Terms:

548685
Biomechanics.

The Effects of Task Difficulty and Vision during Dual-Motor Tasking on Gait in Young and Older Healthy Adults.
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500 $a Adviser: Jennifer Yentes.
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520 $a The overall purpose of this study was to investigate the effect of task difficulty and vision during dual-motor tasking on gait variability in younger and older healthy adults. A total of 23 people participated in this study:15 younger adults (Sex: 5 males, 10 females; Age: 20.6(1.96) years; Body Mass: 64.98(12.78) kilograms; Height: 1.67(0.09) meters) and 8 older adults (Sex: 3 males, 5 females; Age: 70.0(4.07) years; Body Mass 73.43(18.2) kilograms; Height 1.7(0.11) meters). Subjects underwent a series of dual-motor task conditions where the opaqueness of the tray (vision) and the presence of water glasses on top (task difficulty) was varied while walking on a self-paced treadmill. Step width, step time, step length, speed, secondary task performance, and vision variables were calculated from each trial by using mean, standard deviation, coefficient of variation, sample entropy, and recurrence quantification analysis. Increasing task difficulty caused step length and step time to become more periodic and repeatable for both groups. The effect of vision on gait variability caused increased step width variability in the opaque tray conditions, older adults showing more variability than younger adults. Step time became more periodic during these conditions for both groups as well. Speed variability was increased as task difficulty and vision was increased throughout trials. The effect of task prioritization was studied by giving instructions of which task to focus on. Prioritizing the secondary task caused a decreased step length but increased step time variability. Older adults presented with longer maxline lengths indicating a more periodic, recurrent pattern for all gait spatiotemporal variables. Both groups looked down for longer during he prioritization of secondary task condition as compared to prioritizing walking. Younger adults also used their vision more to perform the dual-task compared to older adults.
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