Abstract
Extended practice (500 trials) in judging the Müller-Lyer figure led to a decrement in the magnitude of the illusion. Although the illusion did not disappear, as earlier investigators had reported, it did approach zero when the figure was drawn so that the horizontal line was more prominent than the oblique lines.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Dewar, R. E. Stimulus determinants of the Müller-Lyer illusion and its decrement. Unpublished doctoral dissertation, McMaster University, 1965.
Dewar, R. E. Stimulus determinants of the magnitude of the Mueller-Lyer illusion. Percept., mot. Skills., 1967a, 24, 708–710.
Dewar, R. E. The effect of angle between the oblique lines on the decrement of the Müller-Lyer illusion with extended practice. Percept. & Psychophys., 1967b, in press.
Judd, C. H. Practice and its effects on the perception of illusions. Psychol. Rev., 1902, 9, 27–39.
Köhler, W., & Fishback, Julia. The destruction of the Müller-Lyer illusion in repeated trials: I. An examination of two theories. J. exp. Psychol., 1950, 40, 267–281.
Author information
Authors and Affiliations
Additional information
Note
1. This research was supported by National Research Council of Canada Grant No. APA-141.
Rights and permissions
About this article
Cite this article
Dewar, R.E. Effect of length of oblique lines and prominence of the horizontal line on the decrement of the Müller-Lyer illusion with extended practice. Psychon Sci 8, 509–510 (1967). https://doi.org/10.3758/BF03331725
Published:
Issue Date:
DOI: https://doi.org/10.3758/BF03331725