CAS PS 222 Chapter Notes - Chapter 8: Optical Flow, Motion Perception, Transcranial Magnetic Stimulation
10 Aug 2018
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Document Summary
Function of motion perception: survival in the environment. Predators use movement of prey as a primary means of location in hunting. Attentional capture - motion attracts attention to the moving object. Thus if prey remains motionless, it is less likely to be noticed: motion agnosia. Damage to the cortex resulting in inability to perceive movement. Extremely debilitating and dangerous for the patient. Four ways to perceive motion: 1. Real motion - an object is physically moving: 2. Apparent movement - stationary stimuli are presented in slightly different locations. Basis of movement in movies and tv (e. g. animation: 3. Induced motion - movement of one object results in the perception of movement in another object (e. g. moon and clouds: 4. Observer looks at movement of object for 30 to 60 seconds. Then observer looks at a stationary object. Movement appears to occur in the opposite direction from the original movement. The waterfall illusion is an example of this.
