Perceptual constancy in judgments of egocentric distance: prevailing binocular information

Arquivos Brasileiros de Oftalmologia

Elton H. Matsushima²  Igor O. Douchkin²  Nilton P. Ribeiro Filho²  José Aparecido Da Silva¹ 

[1] ,Universidade de São Paulo at Ribeirão Preto Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto Laboratório de Psicofísica e Percepção

关键词: Visual perception;    Space perception;    Motor skills;    Walking;    Percepção visual;    Percepção do espaço;    Habilidades motoras;    Caminhar;   

DOI  :  10.1590/S0004-27492003000600008

来源: SciELO

【 摘 要 】

Binocular cues were considered the prevailing information 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 judged 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 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.

【 授权许可】

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