S & P lec 2

Question 1

__ types of perception

Answer 1

4
1 form
2 depth
3 colour
4 auditory

Question 2

define

form perception

Answer 2

that way the brain
orders =colour, brightness, lines, shapes,
perceives = words from letters

Question 3

___ early approach to the ___ of ___ ___ =

Answer 3

one
problem
form perception

Gestalt Psychology

Question 4

define

gestalt psychology

Answer 4

theory = states that the task of perception is to identify objects of the environment and according to the organisation of their elements

Question 5

Gestalt psychologists believed __

Answer 5

the whole is more than the sum of its parts

Question 6

gestalt psychologists created a number of ___

Answer 6

laws that described the way elements and grouped and organised by the visual system

Question 7

example of Gestalt’s law
2
define the 1st

Answer 7

2
1 = law of proximity
2 = law of similarity

law of proximity
= elements that are closest together will be perceived as belonging together

e.g vertical lines made of dots

Question 8

define

law of similarity

Answer 8

similar colours/objects get grouped together

Question 9

define

depth perception

Answer 9

interpretting 2-D, 3-D
perceiving distance between objects

interposition or occlusion??

Question 10

examples of depth perception (8)

Answer 10

8

1 linear perspective
2 texture cues
3 atmosphere haze
4 height in the field of elevation ( objects closer to  horizon appear = further
5 motion parallax
6 binocular disparity and stereopsis
7 Muller lyre illusion
8 ponzo illusion

Question 11

our perception of size is closely associated with

Answer 11

our perception of distance

if depth/distance perceived = size perceived

Question 12

stimulus of colour perception

Answer 12

light = form of electromagnetic radiation

occurs in waves

Question 13

define

wavelength

Answer 13

the distance between adjacent waves of radiant energy.

in vision, most closely associated with perceptual dimension of hue

Question 14

short wavlength vs long wavlength image

Answer 14

short wavlength = more peaks and troughs in a set horizontal distance

Question 15

_ dimensions of colour

Answer 15

3
1 = hue
2= brightness
3=saturation

Question 16

define

hue

Answer 16

one of the 3 dimensions of colour

different wavelengths tend to be perceived as diff. hues

short wavlengths = violet/blue/green

long wavlengths = orange/red

Question 17

white light made up of =

Answer 17

the entire spectrum of visible wavlength

differences in wavelength alone don’t account for the differences in colour we perceive.

Question 18

define

brightness

Answer 18

one of the 3 dimensions of colour

the amplitude of the light wave affects the perceived brightness of the colour

greater/higher the amplitude the brighter the colour

Question 19

define

saturation

Answer 19

one of the 3 dimensions of colour

=purity of the light
the more white a colour contains the less saturated it is

e.g grey and black
grey = more white = less sat
black= less white = more sat

Question 20

Define

colour mixing

Answer 20

2 types

the addition of 2 or more lights of diff wavlengths

1= additive colour mixing
2=subtractive colour mixing

Question 21

define

additive colour mixing

Answer 21

one of the 2 types of colour mixing

superimposing lights.
puts more light into the mixture that exists in one light by itself

e.g red + blue + green => white

Question 22

define

subtractive colour mixing

Answer 22

one of the 2 types of colour mixing

removing some wavlength of light, leaving less light than was originally there

example
yellow, cyan and magenta => black

Question 23

which type of colour mixing is the following

red+ green + blue =>

cyan + yellow + magenta =>

Answer 23

white = additive

black = subtractive

Question 24

_ theories of colour perception

Answer 24

2

1=  trichromatic theory of colour vision
2= opponent process theory of colour vision

Question 25

define

trichromatic theory of colour vision

Answer 25

one of the 2 theories of colour perception

any colour could be matched by the additive mixture of just 3 appropriate colour

Young-Helmholtz theory = the human eye has 3 types of receptors (cones) with differing sensitivities to diff light wavelengths

it is the ration of neural activity among these 3 types of receptors that determine the colour percept

Question 26

define

opponent process theory of colour vision

Answer 26

one of the 2 types theories of colour perception

the trichromatic theory could not explain all the aspects of colour vision (e.g Negative afterimages)

Hering proposed the opponent process theory of colour vision

Question 27

colour perception depends on receptors that ______

Answer 27

make antagonistic (opposite) responses to 3 pairs of colour

red vs green

yellow vs blue

black vs white

Question 28

_conclusions of colour perceotion theories

Answer 28

3

1= both trichromatic and opponent process theory required to explain colour vision

2= cone receptor stage follows trichromatic theory principles

3= later stages appear to follow opponent process theory principles

Question 29

Define

auditory perception

Answer 29

one of the 4 types of perception

auditory system (hearing)