The N1 hypothesis and irrelevant sound:Evidence from token set effects

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Campbell , T , Winkler , I , Kujala , T M & Näätänen , R 2003 , ' The N1 hypothesis and irrelevant sound:Evidence from token set effects ' , Cognitive brain research , vol. 18 , no. 1 , pp. 39-47 . https://doi.org/10.1016/j.cogbrainres.2003.09.001

Title: The N1 hypothesis and irrelevant sound:Evidence from token set effects
Author: Campbell, Thomas; Winkler, Istvan; Kujala, Teija Margit; Näätänen, Risto
Contributor: University of Helsinki, Neuroscience Center
University of Helsinki, Department of Psychology (-2009)
University of Helsinki, Faculty of Education Common Matters
Date: 2003
Language: eng
Number of pages: 9
Belongs to series: Cognitive brain research
ISSN: 0926-6410
URI: http://hdl.handle.net/10138/228145
Abstract: This study investigated how increases in the number of different types of sound (token set size) within a heard but ignored sequence influence brain activity and performance in a serial recall task (the irrelevant sound effect). We tested the hypothesis that brain processes affected by the refractory state of the neuronal populations involved in generating the auditory N1 play a role in the memory disruption produced by irrelevant sound. Auditory event-related potentials (ERPs) were recorded when volunteers performed a serial recall task that required remembering lists of visually presented numbers that were followed by a distractor-filled retention interval. The results showed that both increments in set size from 1 to 2 and from 2 to 5 elicited an increase of the N1 amplitude. Furthermore, increases in set size from 2 to 5, but not from 1 to 2, caused a significant decrease of the serial recall performance. This result suggested that, if N1 were to play a role in the disruption produced by irrelevant sound, the processes underlying the N1 wave may only serve as a necessary rather than a sufficient condition for disruption.
Subject: 515 Psychology
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