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Visual distortions Visual illusions

Lecture



Goering's illusion (fan illusion)
  Visual distortions Visual illusions

Straight lines are, in fact, parallel.


Illusion of Wundt (1896)

  Visual distortions Visual illusions

The lines in the center are, in fact, parallel.


  Visual distortions Visual illusions

Here, too, the lines are parallel.


Illusion cafe "Wall"
Are horizontal lines parallel?
  Visual distortions Visual illusions
Yes, parallel!

Illusion discovered by R. Gregory in the Wall Cafe in Bristol (Richard Gregory, 1979).


  Visual distortions Visual illusions

The red lines are straight, although they appear to be curved.


Illusion of Zollner (1860).

  Visual distortions Visual illusions

Parallel straight lines appear to be curved.


The illusion of Poggendorf (Poggendorf, 1860)
  Visual distortions Visual illusions

On one straight line lie the lines BC, not AC, as it seems.


An illusion with twisted ropes (James Frazer, 1908).
Is it straight or not?

  Visual distortions Visual illusions

These are parallel straight lines.


Illusion of Perelman
The letters are actually parallel to each other.
  Visual distortions Visual illusions


  Visual distortions Visual illusions

One more parallel straight lines


Lipps Illusion

  Visual distortions Visual illusions

The central parts of the lines are parallel to each other.


Vertical and horizontal lines are parallel.

  Visual distortions Visual illusions


Illusion of W. Erenstein (W. Ehrenstein, 1921)

  Visual distortions Visual illusions

The square seems distorted.


  Visual distortions Visual illusions

Blue squares appear unevenly painted.


The pattern bends inward?

  Visual distortions Visual illusions

All squares are not really distorted.


Is the pattern coming forward?
  Visual distortions Visual illusions
In the figure, all the squares are not distorted.


Thompson Illusion

  Visual distortions Visual illusions

In the above figure, the direct tangent to all circles of different radii seems to be a curve, since we involuntarily liken it to an upper curved boundary.


Illusion of J. Fraser (Fraser, 1908)

  Visual distortions Visual illusions   Visual distortions Visual illusions

The figures are not spirals, but concentric circles.
James Fraser . "A new visual illusion of direction" // British Journal of Psychology 2: 307-337, 1908


Circles or spirals?

  Visual distortions Visual illusions


Orbinson Illusion

  Visual distortions Visual illusions

Inside the wheel is not an ellipse, but the correct circumference.


  Visual distortions Visual illusions

The circumference in the center seems distorted.


Circles are on the same line.

  Visual distortions Visual illusions

created: 2016-09-10
updated: 2021-03-13
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Psychology of errors and illusions

Terms: Psychology of errors and illusions