Q: What is real motion?
A: Physical movement of an object.
Q: What is apparent motion?
A: Illusion of motion from rapid alternation of static images.
Q: What is the shortest-path constraint?
A: Apparent motion tends to follow the shortest route.
Q: What timing produces apparent motion?
A: Rapid alternation.
Q: What does slow alternation produce?
A: Longer more realistic motion paths.
Q: What is biological motion?
A: Motion patterns of living beings.
Q: What displays demonstrate biological motion?
A: Point-light walkers.
Q: Which brain region processes biological motion?
A: Superior temporal sulcus (STS).
Q: What information can be read from biological motion?
A: Action, emotion
Q: Why is biological motion important?
A: Critical for social perception.
Q: What did the Heider & Simmel study show?
A: People attribute intentions to simple moving shapes.
Q: What does the study reveal about human perception?
A: We impose social meaning onto motion.
Q: Why is this finding important?
A: Suggests motion is central to understanding others.
Q: What is MT (V5)?
A: Motion-processing region in the brain.
Q: What does MT respond to?
A: Direction, speed
Q: What does MT damage cause?
A: Akinetopsia (motion blindness).
Q: What increases MT neural firing?
A: Higher motion coherence.
Q: Is MT necessary for motion perception?
A: Yes.
Q: What are RDKs used for?
A: Testing motion sensitivity.
Q: What is motion coherence?
A: % of dots moving together.
Q: What did Newsome find about coherence thresholds?
A: Monkeys detect direction at ~12% coherence.
Q: What does low coherence signal?
A: Weak motion information.
Q: What does MT microstimulation do?
A: Biases perceived motion direction.
Q: What does TMS over MT cause?
A: Impaired motion perception.
