caa a22 4500 44535268X CHVBK 20180317142849.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s00221-011-2868-8 doi (NATIONALLICENCE)springer-10.1007/s00221-011-2868-8 Differential intrinsic bias of the 3-D perceptual environment and its role in shape constancy [Elektronische Daten] [Antonio Aznar-Casanova, Matthias Keil, Manuel Moreno, Hans Supèr] In a three-dimensional (3-D) environment, sensory information is projected on a 2-D retina with the consequence that the visual system needs space information for accurately reconstructing the visual world. However, the 3-D environment is not accurately represented in the brain; in particular, the perception of distances in depth is imprecise. It has been argued that the visual system has an intrinsic bias of visual space where targets located on the ground floor are perceived on an implicit elevated surface. We studied how such an intrinsic bias of visual space affects shape constancy. We found that the projected shape of a semicircle can be explained taking into account a differential implicit slant surface. The depth/width ratio, which is a measure for the shape of the stimulus, is overestimated for angular declination smaller than ~60°, while it is underestimated for larger angular declinations. Our results are important for explaining shape constancy and may be important for understanding some perceptual illusions. Springer-Verlag, 2011 Visual space nationallicence Perceptual space nationallicence Shape constancy nationallicence Geometrical slant nationallicence Object recognition nationallicence Aznar-Casanova Antonio Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut Keil Matthias Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut Moreno Manuel Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut Supèr Hans Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut Experimental Brain Research Springer-Verlag 215/1(2011-11-01), 35-43 0014-4819 215:1<35 2011 215 221 https://doi.org/10.1007/s00221-011-2868-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2868-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aznar-Casanova Antonio Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut NATIONALLICENCE 700 1- Keil Matthias Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut NATIONALLICENCE 700 1- Moreno Manuel Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut NATIONALLICENCE 700 1- Supèr Hans Institute for Brain, Cognition and Behavior (IR3C), Barcelona, Spain aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 215/1(2011-11-01), 35-43 0014-4819 215:1<35 2011 215 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer