Oculomotor adjustments and size constancy
نویسندگان
چکیده
منابع مشابه
Observer movement and size constancy.
It is commonly assumed that size constancy-invariance of perceived size of objects as they change retinal size because of changes in distance-depends solely on retinal stimulation and vergence, but on no other action-related signals. Distance to an object can change through displacement of either the observer or the object. The common assumption predicts that the two types of displacement shoul...
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In his 1963 Nature paper, Richard Gregory defined size constancy as "the tendency for objects to appear much the same size over a wide range of distances in spite of the changes of the retinal images associated with distance of the object." As this definition makes clear, size constancy is about the appearance of objects, about what things look like. Strictly speaking, size constancy denotes on...
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Whenever a visual image moves across the retina, the brain is faced with a dilemma: Did the image move because an object in the environment (or the environment itself) changed location or because the eyes changed location with respect to a stable environment? If the brain compares the retinal positions of individual objects within the visual image and finds that only one moved with respect to t...
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The use of Virtual Environments (VE) for many research and commercial purposes relies on its ability to generate environments that faithfully reproduce the physical world. However, due to its limitations the VE can have a number of flaws that adversely affects its use and believability. One of the more important aspects of this problem is whether the size of an object in the VE is perceived as ...
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The precision of objective size judgments, made when target disparity changed at random from trial-to-trial, was compared to the precision of angular size judgments made under the same condition. Subjects judged incremental changes in the vertical distance separating a pair of horizontal lines. For the objective judgments (in cm), the angle subtended by the target separation decreased with incr...
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ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1972
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03210943