chapter 6: visual attention Flashcards
selective attention is broken into what ?
overt and covert attention
overt attention
physically looking at something
covert attention
focusing on something without moving your eyes
vigilance
concentrated attention over long periods of time
inattention blindness
failure to perceive non-attended
stimuli
dichotic listening
different stimuli are presented to the left and right ears
shadowing
repeating message from only one ear, using selective attention
cocktail party effect
attention can be focused on one stimulus while ignoring or filtering out other stimuli (noise)
broadbents model of attention
attention is a selective which is filtered, only some information is passed through for further processing
feature integration theory
in the pre attentive stage features are separated unconsciously, in the focused attention stage features are combined using perception (conscious)
saccadic eye movement
scanning, making multiple fixations
what are the three parts of the corollary discharge theory ?
motor signal, corollary discharge signal, and image displacement signal
motor signal
occurs when a signal to
move the eyes is sent from brain to eye muscles
corollary discharge signal
a copy of the motor signal (occurs whenever there is a motor signal)
image displacement signal
occurs when an image moves across the retina (eyes sweeping a scene that is stationary, but creating a blurred image by sweeping across retina)
who proposed the corollary discharge theory ?
helmholtz
what signal does a moving stimulus require ?
corollary discharge signal
what signal does a stationary stimulus require ?
image displacement signal, eye is stationary, stimulus is moving
salience
things that stand out because of their color, contrast, movement, orientation, or some other cognitive factor
scene schemas
based on what we know about how things should be, attention is drawn to the oddball
what part of the brain detects oddballs in a scene ?
amygdala
prediction error
amygdala activated because of oddball, prediction error processing
frontal eye field (FEF)
pre-pre motor area for planning before action, planning where we control eye movement and where we look at something
hemispheric differences in the brain
right is faster than the left
change blindness
failing to notice changes in the environment even when looking directly at it
what side of spatial neglect is more common ?
left visual field
