Angle illusion: How representation of 3-D form drives perceptual errors in 2-D pictures.
Published: 2006
Language: eng
Number of pages: 34
ISBN-13: 9780494213919
Description: Angles between lines on a picture surface may be misjudged when they depict 3-D forms. Our experiment investigated the properties of this possible angle illusion. Subjects were required to estimate acute and obtuse internal angles of quadrilaterals that were either shown alone, or as the top faces of cubes. The drawings of cubes showed the cubes tilted at various angles around a horizontal axis. This generated different acute and obtuse angles in the target quadrilaterals on the 2-D picture surface. For both acute and obtuse angles, the judgements of the quadrilateral on top of the cube were biased towards 90&deg;. The illusory effect was present over the full range of possibilities i.e., for acute angles close to 0&deg; and obtuse angles close to 180&deg;. The results support a perspective theory and run counter to Gestalt and cognitive theories.
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1678.

Thesis (M.A.)--University of Toronto, 2006.

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