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Influence of the gravitational vertical on geometric visual illusions
- Source :
- HAL, Acta Astronautica, Acta Astronautica, Elsevier, 2005, 56 (9-12), pp.911-7
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Abstract
- International audience; The occurrence of geometric orientation illusions and the perception of ambiguous figures were analyzed in 24 subjects during static body tilt relative to gravity on Earth. Results showed that illusions such as the Rock's diamond/square, the Ponzo illusion, and orientation contrast illusions occurred less frequently, and that depth reversal of ambiguous figures took more time when subjects were lying on their side or supine compared to upright, thus suggesting that the gravitational reference plays a significant role in these "visual" illusions. The structure of images, our representation of the environment, and orientation relative to gravity are all integral parts in interpreting visual images. In a weightless environment where no gravitational reference can be used, it is expected that similar alterations in visual perception will occur.
- Subjects :
- Adult
Visual perception
media_common.quotation_subject
MESH: Gravitation
Posture
Illusion
Aerospace Engineering
MESH: Orientation
Spatial Behavior
Geometry
MESH: Pattern Recognition, Visual
MESH: Optical Illusions
050105 experimental psychology
Ponzo illusion
03 medical and health sciences
0302 clinical medicine
MESH: Depth Perception
Orientation (geometry)
Perception
MESH: Spatial Behavior
Orientation
Contrast (vision)
Humans
0501 psychology and cognitive sciences
Computer vision
MESH: Form Perception
[SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]
Mathematics
media_common
Depth Perception
MESH: Humans
MESH: Visual Perception
business.industry
Optical illusion
Optical Illusions
Perceived visual angle
05 social sciences
MESH: Adult
MESH: Posture
Form Perception
Pattern Recognition, Visual
Visual Perception
[SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]
Artificial intelligence
business
030217 neurology & neurosurgery
Gravitation
Subjects
Details
- ISSN :
- 00945765
- Database :
- OpenAIRE
- Journal :
- HAL, Acta Astronautica, Acta Astronautica, Elsevier, 2005, 56 (9-12), pp.911-7
- Accession number :
- edsair.doi.dedup.....2039c71a3bb154ffc658b6f751da94be