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The effects of trunk orientation on ...

Grubb, Jefferson D.

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The effects of trunk orientation on spatial attention.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The effects of trunk orientation on spatial attention./
Author:	Grubb, Jefferson D.
Description:	110 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2659.
Contained By:	Dissertation Abstracts International65-05B.
Subject:	Psychology, Cognitive. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3134414
ISBN:	0496816411

The effects of trunk orientation on spatial attention.
Grubb, Jefferson D.

The effects of trunk orientation on spatial attention. - 110 p.

Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2659.

Thesis (Ph.D.)--University of Denver, 2004.

Fundamentally, people are embodied creatures who inhabit a three-dimensional world. To successfully execute most actions, we must move our bodies through space. Consequently, the extent and configuration of the body should in part determine where attention is deployed. Because the orientation of the trunk constrains the relative orientations of the head, arms, and legs, trunk orientation should be a particularly important anchor for spatial attention. Consistent with this hypothesis, previous researchers have found that manipulations of actual and perceived trunk orientation modulate hemispatial inattention in patients with unilateral neglect. However, equivalent effects in populations other than patients with neglect have been inconsistent. In this dissertation, I report five experiments that explored the conditions under which trunk orientation affected spatial attention in healthy participants. In all experiments, participants performed visuospatial attention tasks while their torsos were turned relative to their heads. In the first experiment, participants displayed no effect of trunk orientation on accuracy or response time in a difficult lateralized target detection task. Likewise, in the second experiment, trunk orientation did not affect participants' performance of a computerized line bisection task. However, in the third experiment, participants were faster to detect invalidly cued targets on the side toward which their trunk was turned when performing a covert orienting task. In the fourth experiment, participants were faster in a choice reaction time task to respond to targets that were aligned with their trunk, but only when walking at a slow, forced pace on a treadmill. In the fifth experiment, participants again responded faster to targets that were aligned with their trunks when walking on the treadmill, even when the participants were walking sideways. Though these results are not conclusive, they may indicate that trunk orientation affects the ability shift the focus of spatial attention. These effects may become more evident when the cognitive system is put under load. Ecologically, such a trunk-centered bias may allow the rapid detection of events at the long term focus of attention while the observer temporarily looks elsewhere.

ISBN: 0496816411Subjects--Topical Terms:

1017810
Psychology, Cognitive.

The effects of trunk orientation on spatial attention.
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245 1 4 $a The effects of trunk orientation on spatial attention.
300 $a 110 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2659.
500 $a Adviser: Catherine L. Reed.
502 $a Thesis (Ph.D.)--University of Denver, 2004.
520 $a Fundamentally, people are embodied creatures who inhabit a three-dimensional world. To successfully execute most actions, we must move our bodies through space. Consequently, the extent and configuration of the body should in part determine where attention is deployed. Because the orientation of the trunk constrains the relative orientations of the head, arms, and legs, trunk orientation should be a particularly important anchor for spatial attention. Consistent with this hypothesis, previous researchers have found that manipulations of actual and perceived trunk orientation modulate hemispatial inattention in patients with unilateral neglect. However, equivalent effects in populations other than patients with neglect have been inconsistent. In this dissertation, I report five experiments that explored the conditions under which trunk orientation affected spatial attention in healthy participants. In all experiments, participants performed visuospatial attention tasks while their torsos were turned relative to their heads. In the first experiment, participants displayed no effect of trunk orientation on accuracy or response time in a difficult lateralized target detection task. Likewise, in the second experiment, trunk orientation did not affect participants' performance of a computerized line bisection task. However, in the third experiment, participants were faster to detect invalidly cued targets on the side toward which their trunk was turned when performing a covert orienting task. In the fourth experiment, participants were faster in a choice reaction time task to respond to targets that were aligned with their trunk, but only when walking at a slow, forced pace on a treadmill. In the fifth experiment, participants again responded faster to targets that were aligned with their trunks when walking on the treadmill, even when the participants were walking sideways. Though these results are not conclusive, they may indicate that trunk orientation affects the ability shift the focus of spatial attention. These effects may become more evident when the cognitive system is put under load. Ecologically, such a trunk-centered bias may allow the rapid detection of events at the long term focus of attention while the observer temporarily looks elsewhere.
590 $a School code: 0061.
650 4 $a Psychology, Cognitive. $3 1017810
650 4 $a Psychology, Experimental. $3 517106
650 4 $a Psychology, Physiological. $3 1017869
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710 2 0 $a University of Denver. $3 1017461
773 0 $t Dissertation Abstracts International $g 65-05B.
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790 $a 0061
791 $a Ph.D.
792 $a 2004
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