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Materias (3283,203): , exocentric space

textos901docs (3283,203): monocular binocular vision, visual psychophysics, exocentric space

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Keywords (GIS/901a) 3908,203: visual space perception|depth perception|monocular and binocular vision|multidimensional scaling|stereopsis|visual psychophysics|exocentric space

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ENTIDAD (Universidad Complutense: Facultad de Psicología): Universidad Complutense: Facultad de Psicología
IPHS (3939,453): oai:dialnet.unirioja.es:ART0000122338

One-dimensional and multi-dimensional studies of the exocentric distance estimates in frontoparallel plane, virtual space, and outdoor open field

The aim of this study is twofold: on the one hand, to determine how visual space, as assessed by exocentric distance estimates, is related to physical space

Publicidad

iii.script.c

Contenidos

The aim of this study is twofold: on the one hand, to determine how visual space, as assessed by exocentric distance estimates, is related to physical space. On the other hand, to determine the structure of visual space as assessed by exocentric distance estimates. Visual space was measured in three environments: (a) points located in a 2-D frontoparallel plane, covering a range of distances of 20 cm; (b) stakes placed in a 3-D virtual space (range H 330 mm); and (c) stakes in a 3-D outdoors open field (range = 45 m). Observers made matching judgments of distances between all possible pairs of stimuli, obtained from 16 stimuli (in a regular squared 4 × 4 matrix). Two parameters from Stevens' power law informed us about the distortion of visual space: its exponent and its coefficient of determination (R2). The results showed a ranking of the magnitude of the distortions found in each experimental environment, and also provided information about the efficacy of available visual cues of spatial layout. Furthermore, our data are in agreement with previous findings showing systematic perceptual errors, such as the further the stimuli, the larger the distortion of the area subtended by perceived distances between stimuli. Additionally, we measured the magnitude of distortion of visual space relative to physical space by a parameter of multidimensional scaling analyses, the RMSE. From these results, the magnitude of such distortions can be ranked, and the utility or efficacy of the available visual cues informing about the space layout can also be inferred.

one-dimensional and multi-dimensional studies of the exocentric distance estimates in frontoparallel plane, virtual space, and outdoor open field (Equipo)

Matsushima, Elton H.
Ribeiro Filho, Nilton P.
Da Silva, José A.

Vínculo

(Revista) ISSN 1138-7416

one-dimensional and multi-dimensional studies of the exocentric distance estimates in frontoparallel plane, virtual space, and outdoor open field (Responsables)

Aznar Casanova, José Antonio

one-dimensional and multi-dimensional studies of the exocentric distance estimates in frontoparallel plane, virtual space, and outdoor open field (documentos)

Spanish journal of psychology, ISSN 1138-7416, Vol. 9, Nº. 2, 2006, pags. 273-284

Keywords (901a / 3939,453)

Keywords

visual space perception
depth perception
monocular and binocular vision
multidimensional scaling
stereopsis
visual psychophysics
exocentric space

Vincular (851 / 3939,453)

Publicidad

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