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Signal averaging to obtain ERPs is necessary because
a) sensory, motor and cognitive processes generate small signals compared to the raw EEG
b) sensory, motor and cognitive processes generate large signals compared to the raw EEG
c) we do not know the time course of the neural events and underlying sensory, motor or cognitive functions
d) the raw EEG alone is not informative about brain processes
I think the answer is a but I’m not completely sure.
Signal averaging to obtain an event related potential (ERP) requires that you know ___
a) the neurochemical processes involved
b) where in the brain the signal is coming from
c) when the event of interest took place
d) which neurons are generating the signal