Poggendorff Illusion as a Function of Orientation of Transversal and Parallel Lines
- 1 August 1976
- journal article
- research article
- Published by SAGE Publications in Perceptual and Motor Skills
- Vol. 43 (1) , 83-90
- https://doi.org/10.2466/pms.1976.43.1.83
Abstract
Adult human subjects (8 male, 8 female undergraduates) with normal vision were required to judge various orientations of the Poggendorff illusion. The transversal and parallel line-segments of the illusion were manipulated to produce the orientations to be judged. Minimum illusion occurred when the transversal line-segment was oriented 90° with respect to true vertical or true horizontal. Magnitude of illusion increased as the transversal line-segment deviated from these positions. The findings suggested that there is a stability of horizontal and vertical orientations. In addition, the hypothesis that visual acuity plays a role in the perception of the Poggendorff illusion was proposed.This publication has 18 references indexed in Scilit:
- The Poggendorff illusion: Amputations, rotations, and other perturbationsPerception & Psychophysics, 1971
- An extension of assimilation theory to illusions of size, area, and directionPerception & Psychophysics, 1971
- Measurements of the Zöllner illusionActa Psychologica, 1964
- The influence of spatial orientation on the Poggendorff illusionActa Psychologica, 1964
- Effect of Orientation on the Visibility of Fine Wires*Journal of the Optical Society of America, 1958
- Some Observations and Theory on the Variation of Visual Acuity with the Orientation of the Test Object*Journal of the Optical Society of America, 1953
- Visual Acuity as Measured with Various Orientations of a Parallel-Line Test Object*Journal of the Optical Society of America, 1948
- THE RELATION BETWEEN VISUAL ACUITY AND ILLUMINATIONThe Journal of general physiology, 1937
- On the resolution of gratings by the astigmatic eyeTransactions of the Optical Society, 1927
- Irregular astigmatism of the eye: effect of correcting lensesTransactions of the Optical Society, 1925