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Accuracy and Precision of Binocular 3-D Motion Perception

Lookup NU author(s): Professor Julie Harris, Phillip Dean


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In principle, information for 3-D motion perception is provided by the differences in position and motion between left- and right-eye images of the world. It is known that observers can precisely judge between different 3-D motion trajectories, but the accuracy of binocular 3-D motion perception has not been studied. The authors measured the accuracy of 3-D motion perception. In 4 different tasks, observers were inaccurate, overestimating trajectory angle, despite consistently choosing similar angles (high precision). Errors did not vary consistently with target distance, as would be expected had inaccuracy been due to misestimates of viewing distance. Observers appeared to rely strongly on the lateral position of the target, almost to the exclusion of the use of depth information. For the present tasks, these data suggest that neither an accurate estimate of 3-D motion direction nor one of passing distance can be obtained using only binocular cues to motion in depth.

Publication metadata

Author(s): Harris JM, Dean PJA

Publication type: Article

Publication status: Published

Journal: Journal of Experimental Psychology: Human Perception and Performance

Year: 2003

Volume: 29

Issue: 5

Pages: 869-881

Print publication date: 01/10/2003

ISSN (print): 0096-1523

ISSN (electronic): 1939-1277

Publisher: American Psychological Association


DOI: 10.1037/0096-1523.29.5.869

PubMed id: 14585011


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