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Event‐Related Potentials (ERP s ) to Interruptions of a Steady Rhythm
Author(s) -
Ford Judith M.,
Hillyard Steven A.
Publication year - 1981
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.1469-8986.1981.tb03043.x
Subject(s) - rhythm , audiology , stimulus (psychology) , psychology , interstimulus interval , communication , auditory event , amplitude , event related potential , electroencephalography , noise (video) , speech recognition , acoustics , neuroscience , physics , cognitive psychology , cognition , computer science , artificial intelligence , medicine , quantum mechanics , stimulation , image (mathematics)
Auditory event‐related potentials (ERP s ) were recorded from the scalps of persons who received repetitive sequences of sounds through earphones. Occasionally and unpredictahly. some ofthe sounds in the sequence occurred at a shorter or longer interstimulus internal (ISI) than usual. In Experiment 1, it was shown that premature noise bursts (ISI = 300 msec) elicited a large, biphasic ERP consisting of an “N e ” component at about 130 msec and a “P E ” wave at about 200 msec. The N E ‐P E complex was several times larger than the N1‐P2 waves elicited either by the regular bursts (ISI ‐ 600 msec) or by delayed noise bursts (ISI = 600 msec) in a sequence where the regular ISI was 300 msec. In Experiment 2, the peak amplitude of the N E wave elicited by infrequent early tones was considerably increased when attention was directed toward the tones. In Experiment 3, the amplitude ofthe N E ‐P E , complex to infrequent early tones in a regular sequence (ISI s of 1200 msec) was either unchanged or actually increased when ISI s were shortened from 600 to 300 msec. It was proposed that the N E ‐P E complex belongs to a class of ERP s that are specifically elicited by a mismatch event in a repetitive stimulus sequence.