chapter 8 beginning

Question 1

akinetopsia

Answer 1

“motion blindness”
motion is either very difficult or impossible to perceive

Question 2

what causes akinetopsia

Answer 2

damage to v5 medial temporal (MT) - temporal-parietal-occipital junction

caused by:
-traumatic brain injury
- neurodegenerative disease such as alzheimers
-epilepsy, hallucinogen persistent perception disorder (HPPD)

Question 3

movement and perceiving objects

Answer 3

observers perceive shapes more accurately and rapidly when an object is moving

or relative to their movement - viewing objects from different perspectives gives us a better idea of what the object is

Question 4

movement and organization

Answer 4

movement groups smaller elements into larger units - thing of a flock of birds flying together

Question 5

movement and perceiving events

Answer 5

movement helps us determine event boundaries - when an events ends and begins - separates activities into meaningful events

Question 6

social perception and movement

Answer 6

social cues are often linked to movement -

also need movement cues to determine intentions and emotions
- heider and simmel (triangles and circle house story)
need to see lips moving to tell who is talking

Question 7

point light walkers

Answer 7

a way of presenting human motion by placing small lights on peoples joints and filming the patterns created by the lights when people move

means observers see a person moving without any other social cues

just based on lights observers were able to tell whether two point walkers were interacting or acting independently

Question 8

real motion

Answer 8

the physical movement of a stimulus - moves across our field of view

Question 9

illusory motion - three types

Answer 9

perception of motion when there actually is none
- apparent motion, induced motion, motion aftereffects

Question 10

apparent motion

Answer 10

when two stimuli in slightly different locations are alternated with the correct timing, an observer perceives on stimulus moving back and forth smoothly between the locations - called apparent motion because there is no real motion between stimuli

Question 11

induced motion

Answer 11

when motion of one object (usually a large one) causes a nearby stationary object (usually smaller) to appear to move

Question 12

motion after effects

Answer 12

when viewing a moving stimulus causes a stationary stimulus to appear to move

Question 13

motion and detection

Answer 13

motion helps us detect things - could help us survive
movement of threats, prey, etc

Question 14

event

Answer 14

segment of time at a particular location that is perceived by observers to have a beginning and an end

Question 15

event boundary

Answer 15

the point at which one event ends and the next one begins

Question 16

waterfall illusion

Answer 16

if you look at a waterfall for 30 to 60 seconds and then look off to the side at a part of the scene that is stationary, everything will appear to move upward for a few seconds

Question 17

comparing real and apparent motion

Answer 17

apparent motion and real motion show similar brain activation - researchers tend to study both types of motion together