Perceptual constancy in judgments of egocentric distance: prevailing binocular information
Arq. bras. oftalmol
;
66(supl.5): 62-68, set.-out. 2003. ilus, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-360368
RESUMO
Binocular cues were considered the prevailing on specifying depth since the beginning of vision research. In the present study, two perceptual responses, the classical verbal report and a more recent method, open-loop walking, were used to assess the role of binocular information for egocentric distance perception. In two cue conditions environments, full- and reduced-cue, observers judge and walked egocentric distances of stimuli presented at eye-level, under binocular or monocular viewing. Results indicated perceptual constancy for open-loop walking and binocular responses, as well as poor performances under strong degradation on visual information (reduced-cue under strong monocular viewing), thus presenting evidence to support the fundamental role of binocular information on perception of egocentric distances. Besides that, visually directed actions could be adequate measures of perceived distance, with a better reliability than verbal report, since they were quite free of intrusion of inferential processes and perceptual tendencies. In addition, reduced head movements, side-to-side as well as back and forth deflexion movements, could have contributed to a near perfect coupling between binocular disparity information and open-loop walking responses.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Desempenho Psicomotor
/
Percepção Espacial
/
Percepção Visual
/
Caminhada
Limite:
Adolescente
/
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Arq. bras. oftalmol
Assunto da revista:
Oftalmologia
Ano de publicação:
2003
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade de São Paulo/BR
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