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The Pulfrich solidity illusion: a surprising demonstration of the visual system's tolerance of solidity violations.
- Source :
-
Psychonomic Bulletin & Review . Oct2023, Vol. 30 Issue 5, p1782-1787. 6p. - Publication Year :
- 2023
-
Abstract
- Physical objects behave following the principle of solidity: One solid object cannot pass through another. To what extent does the visual system integrate this physical regularity as a prior constraint? A new variant of the Pulfrich effect demonstrates a surprising degree of tolerance for violations of solidity when pitted against motion and depth cues. When adult participants view a pendulum swinging in the fronto-parallel plane with both eyes (one of which was covered by a light-attenuating filter), they falsely perceive the pendulum as swinging in an elliptical path (known as the "Pulfrich effect"). Here, we show that even when the pendulum's motion takes place entirely behind a solid horizontal bar, observers nevertheless see the pendulum pass through the bar while moving in an ellipse. This illusion suggests that the Pulfrich effect and the underlying stereoscopic depth cues can be robust to object solidity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *DEPTH perception
*PENDULUMS
*OPTICAL illusions
Subjects
Details
- Language :
- English
- ISSN :
- 10699384
- Volume :
- 30
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Psychonomic Bulletin & Review
- Publication Type :
- Academic Journal
- Accession number :
- 174179146
- Full Text :
- https://doi.org/10.3758/s13423-023-02271-9