Event‐Related Potential Correlates of Two Stages of Information Processing in Physical and Semantic Discrimination Tasks

1 March 1983

journal article
research article
Published by Wiley in Psychophysiology

Vol. 20 (2) , 168-179
https://doi.org/10.1111/j.1469-8986.1983.tb03283.x

Abstract

Event‐related potentials were studied while subjects performed physical and semantic discrimination tasks. Two negative components, N_A and N2, were observed in both kinds of discriminations. The earlier component, N_A, had a constant onset latency, but its peak latency varied as a function of stimulus complexity. N2 latency varied in relation to changes in the peak of N_A. RT and P3 followed N2 by similar amounts of time across tasks. The N_A and N2 components were interpreted as reflecting partially overlapping sequential stages of processing associated with pattern recognition and stimulus classification, respectively.

Keywords

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