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The Time Constant in P300 Recording
Author(s) -
DuncanJohnson Connie C.,
Donchin Emanuel
Publication year - 1979
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.1469-8986.1979.tb01440.x
Subject(s) - waveform , amplitude , constant (computer programming) , time constant , electroencephalography , psychology , task (project management) , audiology , communication , physics , optics , neuroscience , computer science , electrical engineering , quantum mechanics , medicine , management , voltage , economics , programming language , engineering
A standard counting task was used to illustrate the effect of the time constant of the recording system on the amplitude and waveform of the P300 component. A random sequence of 1500 Hz (probability = .10) and 1000 Hz (probability = .90) tones was presented to one male subject. The EEG from C z and P z was recorded simultaneously at time constants of 0.1, 0.3, 1.0, and 10.0 sec. The ERP waveform was markedly affected by the time constant: the shorter the time constant, the smaller the amplitude of both the P300 and Slow Wave components.