The tilt illusion: Length and luminance changes of induction line and third (disinhibiting) line

Brian I. O’Toole

doi:10.3758/bf03213827

The Effect of Local and Global Visual Cues on the Tilt Illusion

Psi Chi Journal of Psychological Research ◽

10.24839/1089-4136.jn11.2.51 ◽

2006 ◽

Vol 11 (2) ◽

pp. 51-56

Author(s):

Ellen L. Schroeder ◽

Amber Levendusky

Keyword(s):

Visual Cues ◽

Tilt Illusion

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The effect of inducing-line length on the magnitudes of the tilt illusion and aftereffect1

Australian Journal of Psychology ◽

10.1080/00049537508255234 ◽

1975 ◽

Vol 27 (1) ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

Peter Wenderoth ◽

Brain O'toole ◽

Ian Curthoys

Keyword(s):

Line Length ◽

Tilt Illusion

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Constant Errors in Judgements of Collinearity Due to the Presence of Neighbouring Objects

Perception ◽

10.1068/p170523 ◽

1988 ◽

Vol 17 (4) ◽

pp. 523-534 ◽

Cited By ~ 4

Author(s):

W H Norman Hotopf ◽

Susannah A Brown

Keyword(s):

Misalignment Effect ◽

The Third ◽

Induction Line

If a line (the pointer) is aligned with a dot (the target) that stands on another line (the induction line) which is at an angle to the pointer, the pointer and the dot may no longer appear collinear. Whether they do or not depends upon the angle formed by the pointer with the induction line: the smaller the angle, the greater the misalignment effect. Misalignment is always in the direction of the induction line, which is why this alignment illusion is called attraction-caused misalignment (attraction misalignment for short). Three experiments are described in which this illusion is explored further. In the first it is shown that the induction line can exert its influence even when not contiguous with the target, though the size of the effect varies inversely with the distance of the induction line from the target. In the second experiment it is demonstrated that a dot as well as a line can induce attraction misalignment and that similarity between the induction and target items increases misalignment. Evidence in support of the theory that the termination of the induction line, as well as the part contiguous with the target dot, may induce attraction misalignment is provided in the third experiment.

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Room tilt illusion in superior cerebellar artery stroke: Are we missing the classical neurological examination?

Neurology India ◽

10.4103/0028-3886.100709 ◽

2012 ◽

Vol 60 (4) ◽

pp. 423 ◽

Cited By ~ 3

Author(s):

Míriam Eimil-Ortiz ◽

InésPecharromándeLas Heras ◽

CarlosLópez de Silanes de Miguel ◽

Marta González-Salaices ◽

MiguelA Sáiz-Sepúlveda

Keyword(s):

Neurological Examination ◽

Superior Cerebellar Artery ◽

Tilt Illusion ◽

Cerebellar Artery

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Obliquity Integration: Variations on a Theme of Delbœuf

Perception ◽

10.1068/p220705 ◽

1993 ◽

Vol 22 (6) ◽

pp. 705-712

Author(s):

Giovanni B Vicario ◽

Giulio Vidotto ◽

Elena Zambianchi

Keyword(s):

Frame Of Reference ◽

The Other ◽

Geometrical Illusion ◽

Tilt Illusion ◽

Variations On A Theme ◽

Rod And Frame

An optical—geometrical illusion, described by Delbœuf and not familiar to specialists, is investigated. The results of two experiments show that the divergence between a bar filled with parallel slanting lines and a line drawn above it is clearly related to this angle of the lines which fill the bar. The illusion is already present when this angle is 10°, reaches its maximum at 20°, decreases at 30°, and almost disappears at 40°. These results are similar to those found for the tilt illusion, are slightly different from those found for the rod-and-frame illusion, and differ greatly from those found for the Zöllner illusion. The other variables considered—the distance between the slanting lines filling up the bar, the distance between the upper line and the bar, and the width of the bar—do not influence the illusion as much. Since either the line appears as diverging from the bar, or the bar seems inclined in relation to the line, the illusion should be considered a complex one. The small oblique lines inside the bar induce obliquity in the opposite sense in the display, but which of the elements is seen as diverging from the other depends on which of the two is established as the frame of reference.

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