The Contingent Negative Variation and the Late Positive Wave of the Average Evoked Potential

Stimuli that are task relevant elicit an averaged evoked potential (AEP) that shows an enhanced positive component (P300) with a peak latency between 200 and 300 msec. The contingent negative variation (CNV) usually terminates with a positive wave with a latency of approximately 300 msec. The possibility that these two phenomena are related was investigated. The data indicate that when conditions are appropriate, both the CNV and P300 can be obtained in the same experimental situation, and their relationship should be further elucidated