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Flashcards in chapter 4-perceiving and recognizing objects Deck (43):
1

extrastriate cortex

region of cortex bordering the primary visual cortex; V2, V3, V4

2

what comes after extrastriate cortex

where and what pathways

3

where pathway

locations and movement of objects; motion/direction, depth sensitive

4

where pathway location

dorsal, parietal, MT/MST

5

what pathway

names and functions of objects; specialized areas that respond best to different types of objects; object recognition

6

what pathway location

ventral, temporal, IT

7

perception processing is what pathway

ventral, what

8

action processing is what pathway

dorsal, where

9

double dissociation

two related mental processes can function independently of each other; damage to one does not affect the other

10

ventral stream damage

no perception, visual form agnosia

11

dorsal stream damage

no action, optic ataxia

12

what imaging technique can be used to find brain areas that do more of one thing than another

fMRI

13

MT/medial temporal function

motion processing (dorsal)

14

FFA/fusiform face area

faces (ventral)

15

EBA/extrastriate body area

responds well to body parts that aren't the face (ventral)

16

PPA/parahippocampal place area

mix location and functionality, processing scenes and places (houses)

17

what process helps with rapid object recognition; little feedback from higher brain areas

feed-forward process

18

feed-forward process

carries out a computation one neural step after another, without feedback from higher areas to lower ones

19

what imaging technique is used for the feed-forward process

EEG, ERP

20

global superiority effect

properties of the whole object take precedence over the properties of parts of the object; large scale properties, overall shape

21

lower vision

detection of basic features (spots and bars); retinal starting point --> LGN --> V1

22

middle vision

loosely defined stage of visual processing that deals with perception of edges and surfaces, determines which regions of an image should be grouped together into objects; V2, V3

23

upper vision

perception of objects; IT

24

receptive fields in extrastriate areas are more ___ than the striate cortex

sophisticated

25

extrastriate receptive fields respond to

visual properties important for perceiving objects; boundary ownership and illusory contours

26

similarity

items with similar properties tend to group

27

proximity

items that are near each other tend to group

28

texture segmentation

carving an image into regions of common texture properties

29

good continuation

two elements will tend to group together if they lie on the same contour

30

occlusion

visual system blocked, cant see all of the object

31

reliability

the degree to which two line segments appear to be part of the same contour

32

T junctions

occlusion of one object from another

33

arrow and Y junctions

indicate corners within an object

34

generic

assumed to be typical or widely representative

35

accidental

specific/unusual, doesnt generalize; hiding or losing info about object

36

dealing with occlusion; preference for ___ views

generic

37

nonaccidental feature

feature of an object that is not dependent on the exact (accidental) viewpoint

38

recognition by components model

biederman's model of object recognition, objects are recognized by the identities and relationships of their component parts

39

geons

geometric ions out of which objects are made

40

recognition by components model is viewpoint ___

invariant

41

viewpoint invariant

recognize object no matter what angle

42

the father an object is rotated from a learned view, the ___ it takes to recognize

longer; visual system not necessarily viewpoint invariant

43

prosopagnosia

inability to recognize faces; right hemisphere damage (FFA)