| Integration of disparity and velocity information for haptic and perceptual judgments of object depth. | |
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MedLine Citation:
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PMID: 21237442 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Do reach-to-grasp (prehension) movements require a metric representation of three-dimensional (3D) layouts and objects? We propose a model relying only on direct sensory information to account for the planning and execution of prehension movements in the absence of haptic feedback and when the hand is not visible. In the present investigation, we isolate relative motion and binocular disparity information from other depth cues and we study their efficacy for reach-to-grasp movements and visual judgments. We show that (i) the amplitude of the grasp increases when relative motion is added to binocular disparity information, even if depth from disparity information is already veridical, and (ii) similar distortions of derived depth are found for haptic tasks and perceptual judgments. With a quantitative test, we demonstrate that our results are consistent with the Intrinsic Constraint model and do not require 3D metric inferences (Domini, Caudek, & Tassinari, 2006). By contrast, the linear cue integration model (Landy, Maloney, Johnston, & Young, 1995) cannot explain the present results, even if the flatness cues are taken into account. |
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Authors:
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Rachel Foster; Carlo Fantoni; Corrado Caudek; Fulvio Domini |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-1-13 |
Journal Detail:
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Title: Acta psychologica Volume: - ISSN: 1873-6297 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-1-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370366 Medline TA: Acta Psychol (Amst) Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Cognitive and Linguistic Sciences, Brown University, Providence, RI, USA; Center for Neurosciences and Cognitive Systems, Italian Institute of Technology, Rovereto, Italy. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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