Non-retinotopic motion processing underlies postdictive appearance modulation T Kawabe |
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Human Information Science Laboratories, NTT Communication Science Laboratories, Japan
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| The appearance of a visual flash is judged in a temporally sluggish manner. For example, the appearance of a visual flash is judged with a bias toward the appearance of a trailing flash. This modulation of visual appearance is called postdictive appearance modulation. Though several studies have demonstrated phenomenological aspects of postdictive appearance modulation, no consensus exists regarding how postdictive appearance modulation occurs. We discuss the possibility that the visual system relies on retinotopic and non-retinotopic motion signals to bind consecutive flashes as an object and, as a result, integrates visual features along the motion trajectory of the object. This integration results in postdictive appearance modulation. Based on this idea, we also argue that we need no special schema to explain postdiction; postdictive appearance modulation simply suggests that the visual system has access only to a temporally integrated status of visual features within a spatiotemporally continuous object. |
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