Directional organization and shape formation: New illusions and Helmholtz’s Square
According to Helmholtz’s Square illusion, a square appears wider when it is filled with vertical lines and higher when filled with horizontal lines (Helmholtz, 1866). Recently, Pinna (2010a) demonstrat- ed that the grouping of small squares on the basis of the similarity principle influences also pe...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-03-01
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| Series: | Frontiers in Human Neuroscience |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2015.00092/full |