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Perception & Attention: Increasing input vs. increasing output -…
Perception & Attention: Increasing input vs. increasing output
McAdams (1999)
design
delay match-to-sample task
attended
unattended
this was achieved by having a colour-matching / orientation-matching task
one stimulus (Gabor) was placed in inside RF, while other (Gaussian) was placed outside - therefore color matching was "attended to" by this neuron, whereas orientation matching was not
neuronal recording in V4
data
introduction
attention - better behavioural response performance
stronger neural responses have a higher signal-to-noise ratio
how does attention modulate neuronal response to a stimulus?
does attention alter stimulus selectivity of individual neutrons?
if attention would alter tuning curves - attention operated through mechanisms other than primarily involved in sensory signals
sharpening of tuning curves?
discussion
input gain
stimulus-stimulus interactions
potential effect of eye movements
Reynolds (2000)
design
data
introduction
discussion
how are alternative explanations excluded?
how can you reconcile contradictory findings?
