Analysis of shape uses local apparent position rather than physical position

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1 Citation (Scopus)


Objects are often identified by the shapes of their boundaries. Here, by measuring threshold amplitudes for detection of sinusoidal modulation of local position, orientation and centrifugal speed in a closed path of Gabor patches, we show that the positions of such boundaries are misperceived to accommodate local illusions of orientation context and motion induced positional bias. These two types of illusion are shown to occur independently, but the misperception of position is additive. We conclude that, in the analysis of shape, the visual system uses the apparent rather than the veridical boundary conformation.

Original languageEnglish
Pages (from-to)1-26
Number of pages26
JournalJournal of Vision
Issue number10
Publication statusPublished - 2021


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