4. Motion

Question 1

Motion Aftereffect (MAE)

Answer 1

the idea that motion is inferred from an object changing position over time.

Question 2

MT (V5)

Answer 2

Areas in cortex specialized for motion

Question 3

Hertz

Answer 3

Cycles per second or frames per second

Question 4

What is the moving image threshold for humans in hertz?

Answer 4

16 hertz

Question 5

Correspondence problem

Answer 5

We can have several interpretations of the illusion of motion when there is no motion.

Question 6

Wagon-Wheel Effect

Answer 6

When information is limited, our brains choose the outcome in which the object moved the least.

Question 7

Aliasing

Answer 7

Changes to the apparent rate or frequent of rotation to produces a “negative frequency” (this explains the wagon wheel effect)

Question 8

What is Motion Good for?

Answer 8

Recovering the 3rd dimension
- structure from motion
- kinetic depth effect

Question 9

What disorder is responsible for motion blindness?

Answer 9

Akinetopsia

Question 10

What is Akinetopsia

Answer 10

damage in MT area
sees motion as stills
can’t tell when to stop fillign her cup
can’t read facial expressions
moving objects don’t attract her attention.