Wk2 - Selective Attention Flashcards
key aspects of attention 5
selectivity
capacity limitation
vigiliance ('sustained attention')
perceptual set ('expectation')
switchingsome ways attention can be selective 3
spatial, temporal, motoric (action)
theoretically why is there a capacity limitation in attention?
the motor system requires ‘one winner’ and only does one thing at a time
how predictive were the cues in the Posner task?
80%
what ‘cost’ was incurred in the posner task?
reaction times were slower for invalid cues
describe contingent capture effect
what result would define this?
attentional capture is dependent on the feature match between the cue and the target.
invalid cues don’t slow responses when the target doesn’t match the cue (i.e. attention is only captured by cues that match the target)
what type of visual search is not affected by the amount of elements in a display?
feature (pop-out) search
what explains why search slopes are larger for target absent displays?
on average more items need to be search to confirm target absence
the ‘what’ pathway of the visual systems extends to which region?
inferotemporal cortex
parietal cortex processes what general type of information?
how/action-based
what are 2 aspects of primate visual system organisation?
modular regions
hierarchical connections
how do visual receptive fields differ by region? 2
size increases up the hierarchy: more immediate regions (V1) have smaller RFs than later regions (V4)
increasingly complex prefered stimuli
V4 neurons are receptive to
colour
describe the effect of feature selective attention that has been in primate v4
colour responsive neurons are more active when the receptive field is passed over a goal-relevant colour, compared to passing over the colour when it is not goal-relevant
what ERP marker of attention is observed in a dichotic listening task?
N1
