What is the Meaning of Shape? - Gestalt Theory

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GESTALT THEORY, Vol. 33, No.3/4 do not say anything about what a shape is. They only state that in the case of the square/diamond illusion some factors influence the switch from one shape to another. Even if these factors are likely really effective, they cannot explain the meaning of shape. As a consequence, on the basis of these factors what determines the perception of a square and a diamond is not accounted for. 4. Doubts about the Role of Frame of Reference 4.1. On the Second Order Square/Diamond Illusion The limits of these hypotheses can be highlighted even more effectively through some new phenomenal conditions useful to understand the meaning of shape. Their rationale is the following: if the perceived shape is a description relative to a perceptual frame of reference, then results analogous to those achieved with the square/diamond illusion are expected to be attained through second order variations of squares and diamonds. In Fig. 3a, the square and the diamond of Figs. 2a and 2c and the rotated square of Fig. 2b are changed by making the sides concave. Under these conditions the two main effects previously described, i.e. the square/diamond switch and the size difference between the horizontal and vertical conditions, are strongly reduced or even absent. They appear more easily like the same figure with different amount of rotation. 392
! " # $ % & ' ( ) * Fig. 3 Second order variations of a square, a rotated square and a diamond 393 Pinna, What is the Meaning of Shape? In !"#$%&'()''!"#$%#&'(#$$" Fig. 3b, the angles are now rounded. The two main effects of the square/ diamond +(!,-).-,(%-/%!0)0'-1&-.(!2%3 illusion are clearly absent. They are also absent in the further conditions illustrated in Figs. 3c-g, where the changes involve the whole shapes. In Figs. 3hj, only one angle of each shape has been changed, but again the square/diamond
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What is the Meaning of Shape? - Gestalt Theory

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