This research was supported by grants HD 10804 and MH 06723 from the USPHS. We would like to acknowledge the many helpful comments of Drs. Daniel Ruchkin, Samuel Sutton and Nancy Squires. We would also like to thank Chester Freeman for electronic assistance and Anita Levine and Linda Murphy for preparation of the manuscript.
Event-Related Potential Correlates of Two Stages of Information Processing in Physical and Semantic Discrimination Tasks
Article first published online: 30 JAN 2007
Volume 20, Issue 2, pages 168–179, March 1983
How to Cite
Ritter, W., Simson, R. and Vaughan, H. G. (1983), Event-Related Potential Correlates of Two Stages of Information Processing in Physical and Semantic Discrimination Tasks. Psychophysiology, 20: 168–179. doi: 10.1111/j.1469-8986.1983.tb03283.x
- Issue published online: 30 JAN 2007
- Article first published online: 30 JAN 2007
- Manuscript received September 14, 1981; accepted for publication September 20, 1982
- Event-related potentials;
- Stages of information processing;
- Pattern recognition;
- Stimulus classification
Event-related potentials were studied while subjects performed physical and semantic discrimination tasks. Two negative components, NA and N2, were observed in both kinds of discriminations. The earlier component, NA, 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 NA. RT and P3 followed N2 by similar amounts of time across tasks. The NA and N2 components were interpreted as reflecting partially overlapping sequential stages of processing associated with pattern recognition and stimulus classification, respectively.