Poggendorff Illusion
The illusion that the two ends of a straight Line Segment passing behind an obscuring Rectangle are offsetwhen, in fact, they are aligned.
See also Illusion, Müller-Lyer Illusion, Ponzo's Illusion,Vertical-Horizontal Illusion
References
Burmester, E. ``Beiträge zu experimentellen Bestimmung geometrisch-optischer Täuschungen.'' Z. Psychologie 12, 355-394, 1896. Day, R. H. and Dickenson, R. G. ``The Components of the Poggendorff Illusion.'' Brit. J. Psychology 67, 537-552, 1976. Fineman, M. ``Poggendorff's Illusion.'' Ch. 19 in The Nature of Visual Illusion. New York: Dover, pp. 151-159, 1996.
- Product Space
- Program
- Projection
- Projection Operator
- Projective Collineation
- Projective General Linear Group
- Projective General Orthogonal Group
- Projective General Unitary Group
- Projective Geometry
- Projective Plane
- Projective Plane PK2
- Projective Space
- Projective Special Linear Group
- Projective Special Orthogonal Group
- Projective Special Unitary Group
- Projective Symplectic Group
- Projectivity
- Prolate Cycloid
- Prolate Cycloid Evolute
- Prolate Spheroid
- Prolate Spheroidal Coordinates
- Prolate Spheroidal Wave Function
- Pronic Number
- Proof
- Proofreading Mistakes