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Event‐Related Potential Correlates of Two Stages of Information Processing in Physical and Semantic Discrimination Tasks
Author(s) -
Ritter Walter,
Simson Richard,
Vaughan Herbert G.
Publication year - 1983
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1983.tb03283.x
Subject(s) - psychology , stimulus (psychology) , event related potential , latency (audio) , information processing , semantic memory , cognitive psychology , communication , cognition , audiology , developmental psychology , neuroscience , computer science , medicine , telecommunications
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.