ERPs indicate the detection of a personally significant sound
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1
Institute for Psychology I, University of Leipzig, Germany
Fast and efficient detection of changes in the environment is important for adaptive behavior. In several studies it has been shown that long-term memory affects the automatic detection of unexpected sounds and may modulate involuntary attention switching mechanisms. Whereas those mainly used group approaches, we had shown that individually chosen personal significance of a sound, namely of one’s own ringtone to incoming text messages, elicits an event-related potential (ERP) following the deviance-related Mismatch Negativity and occurring prior to the initiation of an involuntary attention switch indicated by the P3a (Roye et al., 2007). The present study addressed the question whether the auditory system needs to rely on the extraction of a physical regularity and thus on the detection of a physical mismatch as a prerequisite for that processing. Therefore, we presented an acoustic train of physically variable standards, which were rarely interspersed by a deviating stimulus, while participants were watching a muted movie. That deviating stimulus could be categorized as a deviant by the auditory system solely based on its role as a personally significant, highly familiar stimulus, i.e. as the own ringtone presented in a sequence of other person’s ringtones (8.3 % personally significant stimulus among 91.7 % non-significant stimuli). Results revealed a replication of the previously reported ERP effect to the personally significant sound, which occurred around 200 ms after stimulus onset. There was no formed physical regularity that was violated by a deviant on a physical dimension which could have triggered deeper processing. Thus, we interpret that effect as an index of involuntary detection of the personally significant sound that deviated from successive previous stimuli solely with respect to this long-term memory dependent stimulus feature.
Conference:
MMN 09
Fifth Conference on Mismatch Negativity (MMN) and its Clinical and Scientific Applications, Budapest, Hungary, 4 Apr - 7 Apr, 2009.
Presentation Type:
Poster Presentation
Topic:
Poster Presentations
Citation:
Roye
A,
Jacobsen
T and
Schröger
E
(2009). ERPs indicate the detection of a personally significant sound.
Conference Abstract:
MMN 09
Fifth Conference on Mismatch Negativity (MMN) and its Clinical and Scientific Applications.
doi: 10.3389/conf.neuro.09.2009.05.050
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Received:
24 Mar 2009;
Published Online:
24 Mar 2009.
*
Correspondence:
Anja Roye, Institute for Psychology I, University of Leipzig, Leipzig, Germany, anja.roye@uni-leipzig.de