What is the Meaning of Shape? - Gestalt Theory

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Pinna, What is the Meaning of Shape?
Fig. 12 Diamond-shaped or grand piano-like figures in the same geometrical objects
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In Fig. 13, the accentuation, due to the arrangement of black and white sides of each
square, !"#$%&'()*''!"#$%#&'(#$$"
produces a directional symmetry and elicits several phenomena: (i) a global
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and local rectangle illusion, i.e. the geometrical squares, both locally (each single
square) and globally (the square made up of squares), are perceived like rectangles
elongated in the direction perpendicular to the black sides; (ii) the orientation of
each element appears polarized (upwards in Fig. 13a and downwards in Fig. 13b);
(iii) the elements are grouped in columns and rows and a global waving (up &