Week 5

Question 1

The visual pathways has a :

Answer 1

Hierarchical

Question 2

What are the 3 stages of visual path ways

Answer 2

early
mid-level
transform from image-based

Question 3

what information is extracted from an image?

Answer 3

Line
colour
length
direction

Question 4

what are spacial frequency tuned channels do?

Answer 4

carry the signal through the early stage and explain contrast sensitivity

Question 5

What are objects constructed from?

Answer 5

component lines

Question 6

What are Gobor-like receptive fields?

Answer 6

used to determine shape (colour, luminance, texture) of an object

Question 7

which receptive field is used for localising points?

Answer 7

V1 receptive fields

Question 8

What does the brain automatically do in a scene?

Answer 8

Segment scene into figures/objects and background

Question 9

What is border ownership?

Answer 9

edges are assigned to objects

Question 10

What receptive field is involved with border ownership

Answer 10

V2 receptive fields

Question 11

what is grouping element contours?

Answer 11

Contours tend to be smooth in local regions so elements that extend a contour with minimal change of orientation are likely to be the same contour

Question 12

What is Gestalt grouping principle?

Answer 12

the visual system automatically group together element into larger units (visual system fills gaps)

Question 13

which receptive field response to shapes with convex projections

Answer 13

V4 Receptive field

Question 14

What is texture segmentation ?

Answer 14

carving an image into a region of common texture properties

Question 15

What is the amplitude of modulation?

Answer 15

the radial frequency of a pattern

Question 16

What are the grouping principles?

Answer 16

Similarity and proximity

Question 17

What is the grouping principle of similarity?

Answer 17

The tendency of two features to group together will increase as the similarity between them increases.

Question 18

What is the grouping principle of proximity?

Answer 18

The tendency of two features to group together will increase as the distance between them decreases.

Question 19

What are weaker grouping techniques?

Answer 19

Parallelism and symmetry

Question 20

How to test for Global integration?

Answer 20

Use of multiple circles and determine which one is the mort absurd.

Question 21

The more bumps on a circle in the Global integration task results in:

Answer 21

being easier to identify the target circle

Question 22

how can you measure the sensitivity to structure in texture?

Answer 22

determining how many dot pairs need to have the correct orientation to discriminate structure from random.

Question 23

What are the two stages of Glass texture?

Answer 23

Both dots need the same polarity to signal correct orientation
combine increments or decrements to get global pattrrn

Question 24

what is the Ventral pathway of the brain?

Answer 24

Local stage = V1

global stage = V4

Question 25

What impact on interpretation?

Answer 25

prior knowledge and experiences

Question 26

What matters when predicting movement?

Answer 26

expectation matters

Question 27

What is autism ?

Answer 27

development disorder associated with characterise psychological deficits

Question 28

What does autism entail?

Answer 28

Social interactions communication repetitive behaviour

Question 29

how is autism caused

Answer 29

Cortical damage in pattern processing

Question 30

what are the visual aspects of autism

Answer 30

superior performance on tasks which involve focusing on parts of a complex stimulus

Question 31

What motion threshold is associated with autism?

Answer 31

Poor global motion thresholds

Question 32

what does EFT Mean?

Answer 32

Embedded figures test

Question 33

What is the EFT?

Answer 33

is a visual serach task

Question 34

Is global contour processing difference in ASD?

Answer 34

there is a stronger global contour integration in ASD

Question 35

People that have a higher IQ have a:

Answer 35

Steeper gradient for integration of contour

Question 36

What is a visual aura?

Answer 36

Unformed flashes of white and black light darling zigzag blurred or shimmering cloudy vision hemianopsia

Question 37

What is visual perimetry?

Answer 37

Measure of contrast sensitivity.

Question 38

What are the two types of Visual perimetry ?

Answer 38

static target | Flickering target

Question 39

what is Apperceptive Agnosia?

Answer 39

a person can not name, match or discriminate visual pressed objects

Question 40

What is associative agnosia?

Answer 40

cannot use the derived representation to access stored knowledge of the objects function and association. can copy

Question 41

What is hallmark of integrative agnosia?

Answer 41

an impairment in integrating elements, which are detected into a perceptual whole

Question 42

What is integrative agnosia and the tendency to autism?

Answer 42

consistent with a weaker ability to use the global context when detecting stimuli