Visual size perception and haptic calibration during development.
Identifieur interne : 000B11 ( PubMed/Corpus ); précédent : 000B10; suivant : 000B12Visual size perception and haptic calibration during development.
Auteurs : Monica Gori ; Luana Giuliana ; Giulio Sandini ; David BurrSource :
- Developmental science [ 1467-7687 ] ; 2012.
English descriptors
- KwdEn :
- MESH :
- geographic : Italy.
- physiology : Adolescent Development, Size Perception, Touch Perception, Visual Perception.
- Adolescent, Age Factors, Child, Humans, Likelihood Functions, Models, Statistical.
Abstract
It is still unclear how the visual system perceives accurately the size of objects at different distances. One suggestion, dating back to Berkeley's famous essay, is that vision is calibrated by touch. If so, we may expect different mechanisms involved for near, reachable distances and far, unreachable distances. To study how the haptic system calibrates vision we measured size constancy in children (from 6 to 16 years of age) and adults, at various distances. At all ages, accuracy of the visual size perception changes with distance, and is almost veridical inside the haptic workspace, in agreement with the idea that the haptic system acts to calibrate visual size perception. Outside this space, systematic errors occurred, which varied with age. Adults tended to overestimate visual size of distant objects (over-compensation for distance), while children younger than 14 underestimated their size (under-compensation). At 16 years of age there seemed to be a transition point, with veridical perception of distant objects. When young subjects were allowed to touch the object inside the haptic workspace, the visual biases disappeared, while older subjects showed multisensory integration. All results are consistent with the idea that the haptic system can be used to calibrate visual size perception during development, more effectively within than outside the haptic workspace, and that the calibration mechanisms are different in children than in adults.
DOI: 10.1111/j.1467-7687.2012.2012.01183.x
PubMed: 23106739
Links to Exploration step
pubmed:23106739Le document en format XML
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<author><name sortKey="Gori, Monica" sort="Gori, Monica" uniqKey="Gori M" first="Monica" last="Gori">Monica Gori</name>
<affiliation><nlm:affiliation>Robotics, Brain & Cognitive Sciences Department, Istituto Italiano di Tecnologia, Genoa, Italy. monica.gori@iit.it</nlm:affiliation>
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<author><name sortKey="Giuliana, Luana" sort="Giuliana, Luana" uniqKey="Giuliana L" first="Luana" last="Giuliana">Luana Giuliana</name>
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<author><name sortKey="Sandini, Giulio" sort="Sandini, Giulio" uniqKey="Sandini G" first="Giulio" last="Sandini">Giulio Sandini</name>
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<author><name sortKey="Burr, David" sort="Burr, David" uniqKey="Burr D" first="David" last="Burr">David Burr</name>
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<series><title level="j">Developmental science</title>
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<term>Humans</term>
<term>Italy</term>
<term>Likelihood Functions</term>
<term>Models, Statistical</term>
<term>Size Perception (physiology)</term>
<term>Touch Perception (physiology)</term>
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<front><div type="abstract" xml:lang="en">It is still unclear how the visual system perceives accurately the size of objects at different distances. One suggestion, dating back to Berkeley's famous essay, is that vision is calibrated by touch. If so, we may expect different mechanisms involved for near, reachable distances and far, unreachable distances. To study how the haptic system calibrates vision we measured size constancy in children (from 6 to 16 years of age) and adults, at various distances. At all ages, accuracy of the visual size perception changes with distance, and is almost veridical inside the haptic workspace, in agreement with the idea that the haptic system acts to calibrate visual size perception. Outside this space, systematic errors occurred, which varied with age. Adults tended to overestimate visual size of distant objects (over-compensation for distance), while children younger than 14 underestimated their size (under-compensation). At 16 years of age there seemed to be a transition point, with veridical perception of distant objects. When young subjects were allowed to touch the object inside the haptic workspace, the visual biases disappeared, while older subjects showed multisensory integration. All results are consistent with the idea that the haptic system can be used to calibrate visual size perception during development, more effectively within than outside the haptic workspace, and that the calibration mechanisms are different in children than in adults.</div>
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<Abstract><AbstractText>It is still unclear how the visual system perceives accurately the size of objects at different distances. One suggestion, dating back to Berkeley's famous essay, is that vision is calibrated by touch. If so, we may expect different mechanisms involved for near, reachable distances and far, unreachable distances. To study how the haptic system calibrates vision we measured size constancy in children (from 6 to 16 years of age) and adults, at various distances. At all ages, accuracy of the visual size perception changes with distance, and is almost veridical inside the haptic workspace, in agreement with the idea that the haptic system acts to calibrate visual size perception. Outside this space, systematic errors occurred, which varied with age. Adults tended to overestimate visual size of distant objects (over-compensation for distance), while children younger than 14 underestimated their size (under-compensation). At 16 years of age there seemed to be a transition point, with veridical perception of distant objects. When young subjects were allowed to touch the object inside the haptic workspace, the visual biases disappeared, while older subjects showed multisensory integration. All results are consistent with the idea that the haptic system can be used to calibrate visual size perception during development, more effectively within than outside the haptic workspace, and that the calibration mechanisms are different in children than in adults.</AbstractText>
<CopyrightInformation>© 2012 Blackwell Publishing Ltd.</CopyrightInformation>
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