Graded changes in evoked response (P300) amplitude as a function of cognitive activity
Perception & PsychophysicsPublished 1 June 1973Open access
Emanuel Donchin, Michael Kubovy, Marta Kutas, Randall S. Johnson, R. I. Tterning
Citations139
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TL;DR
Using a stepwise discriminant analysis, it is demonstrated that the amplitude of P300 is a graded function of the complexity of information processing required of a S following a stimulus.
Abstract
Using a stepwise discriminant analysis, we demonstrate that the amplitude of P300 is a graded function of the complexity of information processing required of a S following a stimulus. This relationship between cognitive complexity and P300 is apparent only when the S is not pressed to generate fast and accurate discriminant responses to the stimuli. Under a reaction-time regime, a large P300 is elicited independently of stimulus predictability or cognitive complexity. It seems that P300 is a measure of the amount of activity of a general-purpose cortical processor.
Keywords
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