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Canada (158,372)
Psychology (9,573)
PSYB51H3 (301)
Chapter 7

Chapter 7 textbook notes

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University of Toronto Scarborough
Matthias Niemeier

Chapter 7: Motion Perception Motion aftereffect (MAE): Illusion of motion in a stationary object. Occurs due to the prolonged exposure to moving objects. o Opponent processes for motion detection Computation of Visual Motion o Cell A, Cell B, Cell D, Cell X, Cell M o Werner Reichardts model (bugs in receptive field) Apparent motion: illusory impression of smooth motion. Results from rapid change between objects that appear in diff places in rapid succession. o Sigmund Exners spark light experiment in 1875 Appears in As receptive field, disappears, reappears in Bs receptive field short time later Appeared movement The correspondence and aperture problems o Aperture: small opening which allows only a partial view of the object. o Correspondence problem (motion) : Problem faced by motion detection system of knowing which feature in frame 2 corresponds to a particular feature in frame 1 o Aperture problem: direction of motion unclear when viewed through a aperture o Broader implications: v1 cells see the world through a small aperture (grey triangles) global motion detector (orange triangle) solution another set of neurons listen to the v1 neurons and integrate the conflicting signals Detection of Global Motion in Area MT (middle temporal lobe in the cortex) www.notesolution.com
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