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  • Title: Frames of reference and distinctive figural characteristics affect shape perception.
    Author: Davi M, Proffitt DR.
    Journal: J Exp Psychol Hum Percept Perform; 1993 Aug; 19(4):867-77. PubMed ID: 8409863.
    Abstract:
    In 4 experiments it was found that global frameworks and local distinctive figural characteristics influenced the perception of shape and of pointing. In Experiments 1 and 2, Ss were asked to mark the center of the middle figure in arrays of 3 aligned figures (either triangles or squares). Displacements of the center indicated a perceived deformation of the shapes. In Experiment 3, Ss were asked to adjust the height of triangles in arrays similar to those in Experiment 1. Height adjustments made along the axis of apparent pointing resulted in extents that were shorter than the height necessary to form equilateral triangles. In Experiment 4, stimuli were isosceles triangles in which the apparent distortion had been nulled; however, Ss continued to perceive them as pointing in a direction consistent with their alignment, and hence shape distortion cannot be the cause of pointing.
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