(week 4)Perception- percieving objects and scenes

Question 1

what is the order of sequences in the visual system

Answer 1

light-> retina-> optic chiasm-> LGN-> striate cortex-> extrastriate cortex

Question 2

whats the difference between objects and scenes

Answer 2

scenes- acted within
objects- acted upon

Question 3

whats the definiton of a scene

Answer 3

view of real world environment, contains multiple objects which are organised in a meaningful way

Question 4

what are the Gestalt rules

Answer 4

grouping rules

Question 5

what is perceptual segregation

Answer 5

process of separating complex sensory input into distinct, individual objects or sound streams
key- segregate figure from background

Question 6

what are illusory contours

Answer 6

perceived edges/ boundaries in visual scenes that don’t exist in physical stimulus e.g. Kanizsa triangle

Question 7

what are the 3 object catagorizations

Answer 7

super-ordinate, basic, subordinate

Question 8

what is viewpoint invariance

Answer 8

The ability of the visual system to recognise an object as the same entity regardless of angle or distance it is viewed

Question 9

what is the gist of a scene

Answer 9

general description of scene after a split second

Question 10

what are the 5 global image features

Answer 10

degree of naturalness
degree of openness
degree of roughness
degree of expansion
colour

Question 11

what is cognitve toponymy

Answer 11

study of what place names call tell us about how people conceptualise their enviroment

Question 12

What is the inferotemporal cortex

Answer 12

final stage of the ventral visual pathway.
essential for visual scene analysis

Question 13

what structures in the temporal cortex have been revealed through fMRI experiments in humans

Answer 13

FFA (fusiform face area)
OFA (occipital face area)
PPA (parahippocampal place area)
EBA (extra striate body area)
VWFA (visual world form area)

Question 14

what are grandmother neurons

Answer 14

hypothetical highly selective neurons that activate only in response to a specific complex concept

Question 15

what are the four main issues with perception of objects and scenes

Answer 15

diagnosicity
confusing physiology
grandmothers neurons
object vs affordances