QuickTime® Player software is required to view the .mov and .qt files in this section.

Animations

All animations appear courtesy of Dan Kersten of the University of Minnesota, Department of Psychology, Computational Vision Lab and are used with permission.

Ball-in-a-box: Diagonal (MOV)

Ball-in-a-box: Horizontal (MOV)

Illusory Motion from Shadows (QT)
Reference article: Kersten, D., Knill, D., Mamassian, P., & Buelthoff, I. (1996). Illusory motion from shadows. Nature, 379(6560), 31.

Motion in Depth (MOV)
Reference article: Kersten, D., Mamassian, P., & Knill, D. C. (1997). Moving cast shadows induce apparent motion in depth. Perception, 26(2), 171-192.

Additional Resources

Perceptual Science Group at MIT

Illusions Gallery at the Psychology Department of the University of Massachusetts, Lowell

Optical Illusions and Visual Phenomena

Optics and Visual Perception

Perception Demos