Review Flashcards
early selection hypothesis
the attended input [A] is privileged from the start - channel B does not get to meaning
late selection hypothesis
all input receive relatively complete analysis and selection occurs after the analysis [channel B gets infleunce, but is not brought to conscious level]
perceived colour of an object depends on..
which light components are observed by the material of objects
difference between ‘rods’ and ‘cones’
rods- can distinguish shades [sensitive to low light]
cones- can distinguish colour differences [less sensitive]
structural imaging vs. functional imaging
structural: shape, size, position
functional: activity levels in brain
Position Emission Tomography (PET scan)
places glucose substance in patients body to keep track of radioactivity, which tissue is using more or less of glucose [function]
Magnetic Resonance Imaging (MRI)
relies on magnetic properties of the atoms that make up the brain tissue, provides (structural) imaging
Computerized Axial Tomography (CT scan)
provide three-dimensional X-ray pictures of the brain [prime structure]
Functional Magnetic Resonance Imaging (FMRI)
allow us to track moment-by moment through blood oxygen levels - BOLD
Electronencephalogram (EEG)
a recording of the brain electrical activity- done through voltage changes occurring at the scalp
contrast sensitivity function
how well we can perceive patterns and levels of death
what is the maximum SF (spatial frequency) visible to humans
60 cycles/deg of visual angle
Ventral ‘what’ Pathway
extracts shape and texture information to identify objects
Dorsal ‘where’ Pathway
processes relevant spatial information for the purpose of guiding action [below level of conciseness]
ebbing house illusion
an optical illusion that makes a central object appear larger or smaller depending on the size of objects around it
how do we explain ebbing house illusion?
gestalt principles: your perception is guided by proximity and similarity
Stroop Effect
participants are shown a series of words and asked to name aloud the colour the ink used for each word
how to compete stroop effect?
must suppress automatic processing [reading words] to acquire controlled processing
Feature Search
finding a target based on a single distinct feature [colour or shape] PARALLEL
Conjunction Search
requires identifying a target defined by a combination of two or more features - attentional demanding - SERIAL
conjunction errors
from attention being divided [thinking you saw a green T when you saw ‘green’ and a ‘T’]
in-attentional blindness
a pattern in which people fail to see a prominent stimulus, even though they’re staring at it
unattended channel
the channel that is below conscious level, being ignored
