Chapter 7, Psych

Front 1

Motion aftereffect

Back 1

after viewing motion in a constant direction for a sustained period of time, you see any stationary objects that you view subsequently as moving in the opposite direction (ex. Waterfall illusion)

Front 2

Apparent motion

Back 2

the illusory impression of smooth motion resulting from the rapid alteration of objects that appear in different locations in rapid succession.

Front 3

Problems with apparent motion:

Back 3

1. correspondence problem
2. aperture problem

Front 4

Correspondence problem

Back 4

How do we know which feature in frame two corresponds to which feature in frame 1

Front 5

Aperture problem

Back 5

the fact that when a moving object is viewed through an aperture (or a receptive field), the direction of motion of a local feature or part of the object may be ambiguous.

Front 6

Middle temporal lobe

Back 6

An area of the brain thought to be important in the perception of motion

Front 7

Motion aftereffect

Back 7

after viewing motion in a constant direction for a sustained period of time, you see any stationary objects that you view subsequently as moving in the opposite direction.
-implies opponent process system
-interocular transfer means MAE occurs in part of the visual system where info from both eyes is combined

Front 8

Types of motion:

Back 8

1st order motion: the motion of an object that is defined by changes in luminance

2nd order motion: the motion of an object that is defined by changes in contrast or texture, but not luminance.

Front 9

Superior colliculus

Back 9

Midbrain structure that guides eye movements

Front 10

Types of Eye movements:

Back 10

*smooth pursuit: eye move smoothly to follow moving objects
*saccades: rapid, change fixation form one location to antoher
*vergence: rotate inward/outward to focus on object
*saccades: fast jumps (up to 1000/second); rapid movement of the eyes that change fixation from one object or location to another

Front 11

saccadic suppression

Back 11

the reduction of visual sensitivity that occurs when one makes a saccadic eye movement. Saccadic suppression eliminates the smear from retinal image motion during an eye movement.

Front 12

optic array

Back 12

the collection of light rays that interact with objects in the world in front of a viewer

Front 13

optic flow

Back 13

the changing angular positions of points in a perspective image that you experience as you move through the world

Front 14

Comparator

Back 14

An area of the visual system that receives one copy of the order issued by the motor system when the eyes move (the other copy goes to the eye muscles). The comparator can compensate for the image changes caused by the eye movement.

Front 15

Focus of expansion

Back 15

all points seem to emanate

Front 16

akinetopsia

Back 16

A rare neuropsychological disorder in which the affected individual has no perception of motion.