Basis of the horizontal-vertical illusion

G. C. Avery; R. H. Day

doi:10.1037/h0027737

Basis of the horizontal-vertical illusion

G. C. Avery^*, R. H. Day

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

107 Citations (Scopus)

Abstract

Designed 3 experiments to determine the basis of the horizontal-vertical (HV) illusion using an L figure. Exp. I, using 14 undergraduates, showed that there were no differences in the size of the effect in darkness, semidarkness, and in the light, a result contrary to the visual field explanation. In Exp. II the figure was viewed in the dark with 28 Ss upright and recumbent, and in Exp. III (N = 98) the L figure was oriented between 0- (vertical) and 90- (horizontal) in 15- steps. Data from Exp. II and III show that apparent length is a function of the retinal meridians with which the lines correspond irrespective of their physical or apparent orientation to an external reference. (15 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved).

Original language	English
Pages (from-to)	376-380
Number of pages	5
Journal	Journal of Experimental Psychology
Volume	81
Issue number	2
DOIs	https://doi.org/10.1037/h0027737
Publication status	Published - Aug 1969
Externally published	Yes

Keywords

horizontal-vertical illusion with L figure & apparent length

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10.1037/h0027737

Cite this

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AB - Designed 3 experiments to determine the basis of the horizontal-vertical (HV) illusion using an L figure. Exp. I, using 14 undergraduates, showed that there were no differences in the size of the effect in darkness, semidarkness, and in the light, a result contrary to the visual field explanation. In Exp. II the figure was viewed in the dark with 28 Ss upright and recumbent, and in Exp. III (N = 98) the L figure was oriented between 0- (vertical) and 90- (horizontal) in 15- steps. Data from Exp. II and III show that apparent length is a function of the retinal meridians with which the lines correspond irrespective of their physical or apparent orientation to an external reference. (15 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved).

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Basis of the horizontal-vertical illusion

Abstract

Keywords

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