NDLI: Deviating to the right: Using eyetracking to study the role of attention in navigation asymmetries

Content Provider	Springer Nature Link
Author	Robertson, Joanne S. Forte, Jason D. Nicholls, Michael E. R.
Copyright Year	2014
Abstract	The ability to navigate accurately through the environment and avoid obstacles is essential for effective interactions with the environment. It is therefore surprising that systematic rightward errors are observed when neurologically intact participants navigate through doorways—most likely due to the operation of biases in spatial attention. These rightward errors may arise due to the operation of an extinction-like process, whereby participants overattend to the left doorpost and collide with the right one. Alternatively, rightward biases might reflect a bisection bias, such that the extrapersonal nature of the aperture causes participants to misbisect the aperture slightly to the right of true center. Because eye movements and spatial attention are closely related, in this study we used eyetracking to test the extinction and bisection models in a remote wheelchair navigation task. University students (n = 16) made rightward errors when navigating the wheelchair through a doorway, and fixated more frequently toward the right side of the aperture throughout the trial. These results are inconsistent with an extinction-based theory of navigation asymmetry, which predicts a leftward bias in eye position due to participants overattending to the left side of the doorway. Instead, the observed rightward bias in eye movements strongly supports a bisection-based theory of navigation asymmetry, whereby participants mentally “mark” the midpoint of a doorway toward the right and then head toward that point, resulting in rightward deviations. The rightward nature of participants’ navigation errors and eye positions is consistent with the existence of a rightward attentional bias for extrapersonal stimuli.
Starting Page	830
Ending Page	843
Page Count	14
File Format	PDF
ISSN	19433921
Journal	Perception & Psychophysics
Volume Number	77
Issue Number	3
e-ISSN	1943393X
Language	English
Publisher	Springer US
Publisher Date	2014-12-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Attention Spatial cognition Neglect Pseudoneglect Extrapersonal Peripersonal Eye movements Navigation Perceptual asymmetry Cognitive Psychology
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Sensory Systems Linguistics and Language

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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