Motion perception

Question 1

Purpose of motion perception

Answer 1

• break camouflage
• attract attention
• segregate objects from the background
• interpret events: see how objects interact
• determine structure of objects
• determine actions people are performing

Question 2

Akinetopsia

Answer 2

motion blindness: cannot see thing moving but knows it has

Question 3

Explain illusory motion and the two types

Answer 3

• Fake motion where no movement is occurring
  a. static: can be created by contrasting colours
  b. apparent motion: occurs when a series of stationary images are presented in succession and sufficiently close together. far apart = fast alteration rate = decrease in motion perception

Question 4

Motion after effect

Answer 4

caused by habituation (e.g waterfall)

Question 5

induced motion

Answer 5

nearby object (usually a large one) either affects the
perceived motion of a second object (usually a small one) or causes a second object to appear to move.

Question 6

*Motion induced blindness

Question 7

Motion illusion

Answer 7

1. Footstep illusion: can
2. Aperture problem: movement is ambiguous if ends of

Question 8

Motion induced change blindness

Answer 8

Motion can make it difficult to notice changes