neural basis (of obj. perception) & colour

Question 1

what are V2 neurons sensitive to?

Answer 1

border ownership

Question 2

T/F: V1 neurons are more sensitive to border ownership

Answer 2

false; V1 neurons show similar responses to edges; V2 is more accurate

Question 3

what “may” V2 neurons respond to?

Answer 3

transparency (penguin shadow)

Question 4

V4 neurons respond to ____

Answer 4

complex attributes

Question 5

why might the Inferio-temporal (IT) brain region be important for object recognition?

Answer 5

IT neurons have large receptive fields; respond to complex stimuli (e.g. faces & geon changes)

Question 6

grandmother cell (& what does it require?)

Answer 6

neuron that responds to a specific object at a conceptual level; requires specificity coding

Question 7

specificity coding

Answer 7

objects represented by firing of selectively-tuned neurons

Question 8

sparse coding

Answer 8

objects represented by firing pattern of small group of neurons

Question 9

T/F: jennifer aniston and halle berry hippocampal neurons can be explained by specificity coding

Answer 9

false; since the cells are found in hippocampus (not visual area), can’t be specificity coding; instead, sparse coding would be more accurate

Question 10

modular representation

Answer 10

specific cortical areas respond to specific stimuli (e.g. faces)

Question 11

distributed representation

Answer 11

certain stimuli activate numerous areas distributed across brain

Question 12

reverse-hierarchy theory

Answer 12

become aware of details after “re-entrant” feedback

Question 13

hue

Answer 13

psychological, chromatic attribute of colour that varies with the physical wavelength of light

Question 14

monochromatic hues (& also called)

Answer 14

contain a single wavelength; spectral hues

Question 15

non-spectral hues

Answer 15

arise from combo of wavelengths

Question 16

purity (what is least pure colour?)

Answer 16

depends on wavelength content of light; contains only single wavelength; white is least pure

Question 17

psychological strength of colour is ___

Answer 17

saturation

Question 18

least saturated colour

Answer 18

white

Question 19

intensity of light is __

Answer 19

brightness

Question 20

three-dimensional colour space

Answer 20

wavelength, purity, intensity

Question 21

three-dimensional colour space (wavelength, purity, intensity) linked with

Answer 21

hue, saturation, brightness

Question 22

RGB based on relative intensity of

Answer 22

red, green & blue

Question 23

HSB based on

Answer 23

hue, saturation, brightness

Question 24

subtractive colour mixing

Answer 24

adding a colour to another subtracts certain wavelengths from getting reflected into your eye (e.g. mixing paints)

Question 25

best subtractive primaries

Answer 25

cyan, magenta, yellow, (black)

Question 26

additive colour mixing

Answer 26

adding a colour to another adds wavelengths that get reflected to eye

Question 27

pointillism is an example of __ colour mixing

Answer 27

additive colour mixing

Question 28

additive primaries

Answer 28

red, blue, green