Perception Test Continued 7,8,9

Front 1

What is Ganzfeld/whole field?

Back 1

light falling on retina with no visual structure: eventually, perception is of a uniform dark gray field

Front 2

What is involuntary eye movement?

Back 2

spontaneous, unconscious unavoidable movements

Front 3

What is stabilized retinal image

Back 3

image presented through computer goggles such that image moves in such a way as to cancel out involuntary movenments

Front 4

whose experiment is Stabilized retinal image

Back 4

Ganzfeld

Front 5

What happens when a stablized retinal image is produced

Back 5

a ganzfeld-like experience: the light is still there and visual edges are present but temp blindness still results

Front 6

What is version movement?

Back 6

looking back and forth

Front 7

what is saccades

Back 7

rapid movement from one fixation point to the next

Front 8

what is vergence movements

Back 8

crossing your eyes, very slow, double vision can result if theres a problem
can be a distance cue.

Front 9

What are the 4 different types of vision movements?

Back 9

version
saccades
smooth pursuit
vergence

Front 10

What is lateral?

Back 10

side view of the eye

Front 11

what is lateral inhibition

Back 11

A)high intensity lots of lines
B)moderate medium lines
c)low little amount of lines

Front 12

what happens if moderate and low amount of lines?

Back 12

As B gets brighter A looks darker in comparison

Front 13

What is mach bands

Back 13

when illumination changes rapidly, a faint dark band can be seen on the dark side of the edge, and a faint light band can be seen on the light side of the edge.

Front 14

What is Scotoma

Back 14

blind spot due to damage to the visual system

Front 15

What is Krauskopf's color circel experiment

Back 15

green ring,red circle inside. Red ring stablized green reing not stable on retina. red circle disappeared. People saw a solid green disc.

Front 16

What is albedo?

Back 16

propartion of light reflected back from a surface

Front 17

are surfaces generally black and white?

Back 17

no, they just have albedo

Front 18

What is albedo

Back 18

reflects alot of light
or alittle

Front 19

What is lightness constancy

Back 19

generally you're pretty good at ignoring the fact that the lightness reflected by and oject is constantly changing

Front 20

What is the four different light factors?

Back 20

Albedo
Gelb's exper
Ration principle
Wallach's exper

Front 21

What is Gelbs exper?

Back 21

he secretly shined a lot of light on a black ( on a dark background) he made the black disk appear white
by turning off the hidden light resulted in people saying no I wrong its black then questioning themselves.

Front 22

What is ratio principle

Back 22

lightness perceived depends not on amount of light reaching your eye, but rather on the ration of light from different areas.

Front 23

Wallach disk eperiment

outside disk 200 then 500
Inside disk 100 then 100? 250

Back 23

shown two rings with a circle in the middle
Goal is to match the other

Front 24

Do correctly match is to

Back 24

change the middle circle to reflect the 100 units
Instead: people changed the middle to reflect the 250 units of light preserving the ration of light, rather than absolute amount.

Front 25

What are the 3 kinds of visual acuity ( focus )

Back 25

Emmetropic vision
myopia
hyperopia

Front 26

emmetropic?

Back 26

cornea and lens work well, eyeball is the right shape

Front 27

myopia

Back 27

nearsighted: bends light too much

Front 28

hyperopia

Back 28

farsighted: bends light too little

Front 29

hue

Back 29

psychological reaction to different wavelengths

Front 30

momochromatic

Back 30

one color

Front 31

achromatic

Back 31

black white gray

Front 32

substractive rule?

Back 32

obey color mixture rule yellow and blue make green

Front 33

additive

Back 33

yellow light and blue light make white

Front 34

satuarion?

Back 34

intensity of a given hue

Front 35

highly unsaturation is?

Back 35

very light or and grey or dark

Front 36

highly saturated is?

Back 36

vivid and strong

Front 37

lightness refers too?

Back 37

overall amount of reflectance from and object something that reflects a lot of light is light, that doesn't is dark

Front 38

trichromatic

Back 38

three different cones ( cones contain color)

Front 39

What are the three diff cones

Back 39

s small wavelengths of light blue and violet
m medium green and yellow
l long yellow orange red

Front 40

trichromatic theory

Back 40

a single wave length of light will activate all 3 types of cones in diff amounts and
color sensation are produced by proportional contributions of the three cones

Front 41

Opponent process theory

Back 41

some colors activate some cells an inhibit others
ex) stare then blink

Front 42

What are the 3 types of opponents

Back 42

red-green
red present decrease when green present
yellow blue
increase with yellow, decrease with blue
black -white
same for light intensity not color

Front 43

color blindness

Back 43

most of ten occurs when one tyoe of cone is not working

Front 44

3 types of colorblindness

Back 44

protanopia no L cone cells
Deuteranopia no M cone cells
Tritanopia No S cone cells (rare)

Front 45

momchromacy

Back 45

lack of 2 kinds of cone receptors (or all 3)

Front 46

Doubleopponent process cell

Back 46

see the color and sends it to the brain to transolate

Front 47

color constancy

Back 47

when the wavelength of the illumination source changes

Front 48

Land' Mondrian

Back 48

illuminating the color patches with different wavelengths changes the light coming back to the eye