visual perception

Question 1

Observable behaviour + verbal recounting of behaviour = consciousness (T/F)

Answer 1

FALSE - case of parasomnias, blindsight

Question 2

Milner and Goodale propose that we have 2 visual systems________ of which include consciousness

Answer 2

only ONE of which incl consciousness

Question 3

Zombie agents refer to ______________

Answer 3

sensory motor systems that carry out specialised behaviour rapidly, WITHOUT conscious awareness
may require consciousness for regulatory feedback but mostly no need

Question 4

Simple visual input, short processing time, steoreotyped motor outputs is characteristic of________ visual system

Answer 4

Zombie agents

Question 5

The seeing system incorporates __________ features

Answer 5

complex info, greater motor variability, longer processing, consciousness, object centred coordination,

Question 6

Describe CFS

Answer 6

• One eye is presented with moving stimuli, second presented with TARGET
• Very difficult to find it, BUT occular tracking shows that we spend majority of the time looking at it (but arent able to report bc unconscious)

Question 7

the function of sight is to____________

Answer 7

absorb external info about the world through light

Question 8

The cornea and the lens function to________

Answer 8

FOCUS image

Question 9

eye movements can be measured by_____________

Answer 9

1) frequency of blinks
2) pipillary response
3) Saccades
4) Saccadic suppression
5) fixational eye movements
6) micro saccades
7) tremors

Question 10

In relation to sccades + micro saccades, tremors are_________

Answer 10

SMALLER

Question 11

Saccadic suppression refers to__________

Answer 11

zombie agents condensing info from when our eyes dart around involuntarily, = we see an edited version that suppresses what we see during darting around. Can see in others but not in self

Question 12

Microsaccades function to

Answer 12

bring image back to the centre of the vision

Question 13

Retinal ganglion cells are____________

Answer 13

cells summarising info form receptors + communicating this via AP’s

Question 14

The optic nerve is made of____________

Answer 14

RGC axons

Question 15

RGC are sufficient for conscious vision

Answer 15

FALSE

Question 16

Achromatopsia – specific deficit in colour perception due to__________

Answer 16

damage to the FUSIFORM GYRUS

Question 17

Blindsight occurs when ________

Answer 17

lesion to the V1

Question 18

The 3 types of fixational eye movements are and we________ conscious of it

Answer 18

Drift, tremor, microsaccade

UNCONSCIOUS

Question 19

Fixational eye movements are very small and therefore do not affect visual processing (T/F)

Answer 19

FALSE - are small and therefore affect individuals neurons differently = constantly changing perception

Question 20

How is lucid dreaming tested /verified

Answer 20

ask people in their dreams to do SMOOTH PERSUIT –> smoothly follow an object in their dreams

Question 21

Saccadic eye movements are

Answer 21

Refer to large, voluntary eye movements

Question 22

The major types of eye movements are

Answer 22

Saccadic eye movements
Smooth pursuit
Vergence (moving of BOTH eyes for binocular vision)

Question 23

How was the blind spot generated?

Answer 23

is a thick bundle of nerves where there is a lack of photo receptors

Question 24

Why might it be suggested that Octopus’s eyes are vetter organised ?

Answer 24

Their photoreceptors are located immediately behind the lens = don’t have thick layers of cells + don’t have blind spot = EFFICIENT

Question 25

Foveal vision covers how much of your visual angle? 
1 deg 
2 deg 
5deg 
10 deg

Answer 25

1 degree