Sensation And Perception:

Front 1

Three functions of color vision

Back 1

1. allows for organization and survival
2. helps differentiate ground and figure
3. helps identify objects

Front 2

reflectance

Back 2

percentage of light reflected

Front 3

reflectance curve

Back 3

percentage of light reflected as a function of wavelength

Front 4

achromatic colors

Back 4

colors that result in equal reflectance across all wavelengths

Front 5

chromatic colors

Back 5

colors that result from reflectance that are greater at some wavelenghts than others.

Front 6

selective transmission

Back 6

colors that result from the way some objects transmit only soem wavelengths

Front 7

Trichromatic Theory& evidence for:

Back 7

Eye detects red green and blue and all other colors can be combined from these colors.
o Color matching experiments showed that 3 lights were necessary to create a metamer therefore there must be 3 different photo receptors

o Discovery of 3 types of cones, each with a sensitivity to different wavelengths of light

Front 8

Metamers

Back 8

Metamers- a pair of stimuli with physical differences but have same perceptual experience in the observer (e.g. two patterns of light with different spectral compositions that appear to be identical in color)
• Prove color is psychophysical

Front 9

Opponent-Process Theory & evidence for

Back 9

perception of color is based on the output of three mechanisms, each of them an oppoency between two colors; red-green, blue-yellow, and black-white

• discovery of color opponent neurons in LGN with circular surround RFC

Front 10

Color Opponent Neuron

Back 10

a neuron whose output is based on a difference between sets of cones

Front 11

Oculomotor Depth Cues

Back 11

Convergence - when eyes point inward as something gets closer
accommodation- eye changes shape when it focuses

Front 12

Monocular Depth Cues

Back 12

Static (pictoral cues) interposition, height in the image, texture gradient, size, linear perspective, atmospheric perspective

Front 13

interposition

Back 13

something in front of something else

Front 14

motion movement parallax (monocular depth cue based on motion)

Back 14

points between you and fixation point move in opposite direction and things beyond fixation point are moving in same direction

Front 15

Deletion and Accretion

Back 15

What comes into our view as we move appearance disappearance and reappearance of portions of objects especially those far away

Front 16

Optical Flow

Back 16

apparent motion of all points of space as we move though it

Front 17

Horopter

Back 17

Imaginary line in space made up of locations of all corresponding points on retina..we construct depth based on disparity of retinal images

Front 18

Disparity Selective Cells

Back 18

Cells that respond preferentially to identical stimului at non-corresponding ponts (ie.e those presented with disparity) these cells can be selective for crossed or uncrossed disparities of varying degrees

Front 19

ventral stream

Back 19

what pathway..temporal lobe. deals iwth object recognition and form representation

Front 20

dorsal stream

Back 20

where pathway. recognizes where objects are in space.. happens throughout visual cortex..to parietal lobe..