منابع مشابه
Time course of perceptual grouping by color.
Does perceptual grouping operate early or late in visual processing? One position is that the elements in perceptual layouts are grouped early in vision, by properties of the retinal image, before perceptual constancies have been determined. A second position is that perceptual grouping operates on a postconstancy representation, one that is available only after stereoscopic depth perception, l...
متن کاملThe time course of perceptual grouping in natural scenes.
Visual perception starts with localized filters that subdivide the image into fragments that undergo separate analyses. The visual system has to reconstruct objects by grouping image fragments that belong to the same object. A widely held view is that perceptual grouping occurs in parallel across the visual scene and without attention. To test this idea, we measured the speed of grouping in pic...
متن کاملTime course of grouping of shape by perceptual closure: effects of spatial proximity and collinearity.
We examined time course of grouping of shape by perceptual closure in three experiments using a primed matching task. The gaps between the closure-inducing contours varied in size. In addition, depending on the distribution of the gaps along the closure-inducing contours--occurring at straight contour segments or at the point of change in contour direction--collinearity was either present or ab...
متن کاملPerceptual Grouping and Change Detection Perceptual Grouping in Change Detection Perceptual Grouping and Change Detection
Detection of an item changing its location from one instance to another is typically unaffected by changes in the shape or color of contextual items. However, we demonstrate here that such location change detection is severely impaired if the elongated axes of contextual items change orientation, even though individual locations remain constant and even though the orientation was irrelevant to ...
متن کاملThe Time Course of Perceptual Learning
Two groups of participants were trained to perceive an ambiguous sound [s/f] as either /s/ or /f/ based on lexical bias: One group heard the ambiguous fricative in /s/-final words, the other in /f/-final words. This kind of exposure leads to a recalibration of the /s/-/f/ contrast, e.g. [4]. In order to investigate when and how this recalibration emerges, test trials were interspersed among tra...
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ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1997
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03206856