Two reference frames for visual perception in two gravity conditions.
Identifieur interne : 001661 ( PubMed/Checkpoint ); précédent : 001660; suivant : 001662Two reference frames for visual perception in two gravity conditions.
Auteurs : Mark Lipshits [Russie] ; Ana Bengoetxea ; Guy Cheron ; Joseph McintyreSource :
- Perception [ 0301-0066 ] ; 2005.
English descriptors
- KwdEn :
- MESH :
- methods : Photic Stimulation.
- physiology : Orientation, Perceptual Distortion, Visual Perception.
- psychology : Weightlessness Simulation.
- Analysis of Variance, Cues, Female, Gravitation, Humans, Male, Psychophysics, Reaction Time, Space Flight.
Abstract
The processing and storage of visual information concerning the orientation of objects in space is carried out in anisotropic reference frames in which all orientations are not treated equally. The perceptual anisotropies, and the implicit reference frames that they define, are evidenced by the observation of 'oblique effects' in which performance on a given perceptual task is better for horizontally and vertically oriented stimuli. The question remains how the preferred horizontal and vertical reference frames are defined. In these experiments cosmonaut subjects reproduced the remembered orientation of a visual stimulus in 1g (on the ground) and in 0g, both attached to a chair and while free-floating within the International Space Station. Results show that while the remembered orientation of a visual stimulus may be stored in a multimodal reference frame that includes gravity, an egocentric reference is sufficient to elicit the oblique effect when all gravitational and haptic cues are absent.
PubMed: 15991691
Affiliations:
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pubmed:15991691Le document en format XML
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<term>Orientation (physiology)</term>
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<front><div type="abstract" xml:lang="en">The processing and storage of visual information concerning the orientation of objects in space is carried out in anisotropic reference frames in which all orientations are not treated equally. The perceptual anisotropies, and the implicit reference frames that they define, are evidenced by the observation of 'oblique effects' in which performance on a given perceptual task is better for horizontally and vertically oriented stimuli. The question remains how the preferred horizontal and vertical reference frames are defined. In these experiments cosmonaut subjects reproduced the remembered orientation of a visual stimulus in 1g (on the ground) and in 0g, both attached to a chair and while free-floating within the International Space Station. Results show that while the remembered orientation of a visual stimulus may be stored in a multimodal reference frame that includes gravity, an egocentric reference is sufficient to elicit the oblique effect when all gravitational and haptic cues are absent.</div>
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<Abstract><AbstractText>The processing and storage of visual information concerning the orientation of objects in space is carried out in anisotropic reference frames in which all orientations are not treated equally. The perceptual anisotropies, and the implicit reference frames that they define, are evidenced by the observation of 'oblique effects' in which performance on a given perceptual task is better for horizontally and vertically oriented stimuli. The question remains how the preferred horizontal and vertical reference frames are defined. In these experiments cosmonaut subjects reproduced the remembered orientation of a visual stimulus in 1g (on the ground) and in 0g, both attached to a chair and while free-floating within the International Space Station. Results show that while the remembered orientation of a visual stimulus may be stored in a multimodal reference frame that includes gravity, an egocentric reference is sufficient to elicit the oblique effect when all gravitational and haptic cues are absent.</AbstractText>
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<SpaceFlightMission>manned</SpaceFlightMission>
<GeneralNote Owner="NASA">Grant numbers: Russian Fund for Fundamental Research 02-04-48234.</GeneralNote>
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