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Motion Perception


Visual Perception of Real Movement

Threshold for Motion Perception

Movement of the Observer


Illusory Movement

Stroboscopic Movement

Autokinesis

Induced Movement

Movement Aftereffects

Link Mark Newbold has a demonstration of rotating spirals (actually counter-rotating spirals), which allows you to demonstrate motion aftereffects.


Physiological Basis of Motion Perception


Theoretical Explanations for Motion Perception

Corollary Discharge Theory

Direct Perception Approach

Computational Approach


Test Yourself


Teaching Materials

Thomson Higher Education has published two very useful CD-ROMs. John Baro (Polyhedron Learning Media) has developed Insight: A Media Lab in Experimental Psychology [see Form and Motion] and Colin Ryan (James Cook University) has developed Exploring Perception [see Module 2].

Link - Brian Rich has a brief page that discusses the various mechanical means of creating apparent motion (thaumatropes, flip books, phenakistoscopes, and zoetropes).

Lafayette Instruments The Illusionator is very effective for teaching about motion aftereffects. Most people use the rotating spiral by having students continuously view it and then stop the motion, producing the perception of motion in the opposite direction. As Jeremy Wolfe pointed out at one EPA conference, it might be even more effective for the instructor to stand facing the class just adjacent to the rotating spiral. If students look at your face after adapting to the rotating spiral, it will appear to explode or implode depending on the rotation of the spiral.

Link - Michael Bach has created a site of visual illusions that contains many motion illusions.

Link - You will find a very extensive set of illusions, including motion illusions, at SandlotScience.

Link - Josh McDermott and Ted Adelson (MIT) have produced a very nice tutorial page regarding motion and form perception.

Link - V. S. Ramachandran (UC San Diego) has provided a number of illustrations of motion effects (e.g., apparent motion).

Link - Yoram Bonneh, Alexander Cooperman, and Dov Sagi (Weizmann Institute of Science) provide a number of different demonstrations involving motion induced blindness.

Link - Bennett Bertenthal (U Chicago) has a page with demonstrations and useful information on biological motion.

Link - Biomotion Lab has provided nice demonstration of biological motion, with manipulable parameters.

Link - The Smith-Kettlewell Eye Research Institute maintains a research page that contains relevant links on motion perception.


Recommended Readings

Jansson, G., Bergström, S. S., & Epstein, W. (Eds.) (1994). Perceiving objects and events. Erlbaum.