ISSN:
1469-8986
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
,
Psychology
Notes:
The purpose of this study was to compare the evoked potential (EP) to the “imperative stimulus” (S2) in the contingent negative variation (CNV) paradigm with the EP to a comparable stimulus nut associated with a CNV. Twelve subjects performed a task that required reporting an occasional change in frequency of a tone. In one condition each change was paired with a warning Hash, thus generating a CNV. In another condition tone changes were only occasionally preceded by a flash and no CNV was observed. Three differences were noted in the vertex EP associated with a CNV: 1) all components after approximately 60 msec were shifted in a more positive direction, 2) negative components Nl and N2 were shorter in latency, and 3) negative components N1, N2, and N3 were attenuated in amplitude. Possible interpretations of these results are discussed. Conclusions are drawn concerning the methodological and theoretical importance of this interaction between the CNV and EP.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1469-8986.1976.tb00853.x
