Abstract
A within-race design was employed in which two forms of the Mueller-Lyer illusion and the vertical-horizontal illusion were studied as a function of pigmentation density of the eye and target size. It was found that the illusions did not vary as a function of pigmentation density. In addition, with an increase in target size the ingoing Mueller-Lyer and vertical-horizontal illusions remained relatively constant but the outgoing Mueller-Lyer illusion decreased. Explanations are offered for both sets of results.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
BEGELMAN, D., & STEINFELD, G. An investigation of several parameters of the horizontal-vertical illusion. Perception & Psychophysics, 1967, 2, 539–543.
BINET, A. La mèsures des illusions visuèlles chez les enfants. Revue Philosophique, 1895, 40, 11–25.
BUTCHARD, N., & PRESSEY, A. W. The effects of closing lines on the two forms of the Müller-Lyer illusion. Psychonomic Science, 1971, 23, 257–258.
HEYMANS, G. Quantitaetive Untersuchungen ueber das “optische Paradoxon.” Zeitschrift für Psychologie und Physiologie der Sinnesorgane, 1896, 9, 221–255.
PIAGET, J. The mechanisms of perception. Trans. G. N. Seagrim. London: Routledge & Kegan Paul, 1969.
POLLACK, R. H., & SILVAR, S. Magnitude of the Mueller-Lyer illusion in children as a function of pigmentation of the Fundus oculi. Psychonomic Science, 1967, 8, 83–84.
PRESSEY, A. W. An extension of assimilation theory to illusions of size, area, and direction. Perception & Psychophysics, 1971, 9, 172–176.
PRESSEY, A. W., BUTCHARD, N., & SCRIVNER, L. Assimilation theory and the Ponzo illusion: Quantitative predictions. Canadian Journal of Psychology, in press.
Author information
Authors and Affiliations
Additional information
This study is based on a Master’s thesis submitted by C. A. Bayer to the University of Manitoba. It was supported in part by a National Reserach Council of Canada grant (APA-177) to the second author.
Rights and permissions
About this article
Cite this article
Bayer, C.A., Pressey, A.W. Geometrie illusions as a function of pigmentation of the Fundus oculi and target size. Psychon Sci 26, 77–79 (1972). https://doi.org/10.3758/BF03335437
Published:
Issue Date:
DOI: https://doi.org/10.3758/BF03335437