| Responses to deviants are modulated by subthreshold variability of the standard. | |
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MedLine Citation:
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PMID: 21899557 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Auditory mechanisms automatically detect both basic features of sounds and the rules governing their presentation. In the oddball paradigm, the auditory system detects the sameness (or no-variability) rule when the same reference tone is consistently repeated. We used two oddball protocols, the classical one with a fixed reference and a modified one with a jittered reference, to determine whether the auditory system can detect subthreshold violations of sameness. We found that the response to the repeated standard was not modified by the small jitter. However, the response to the frequency oddball was smaller under the jittered protocol, indicating hypersensitivity to sameness. The sensitivity to jitter was largest when the oddball deviated by 8%, was smaller for 40%, and disappeared at 100% deviation, indicating that sensitivity to sameness is context dependent; namely, it is scaled with respect to the overall range of stimuli. |
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Authors:
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Luba Daikhin; Merav Ahissar |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-7 |
Journal Detail:
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Title: Psychophysiology Volume: - ISSN: 1540-5958 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-8 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0142657 Medline TA: Psychophysiology Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Society for Psychophysiological Research. |
Affiliation:
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Department of Psychology and Cognitive Sciences, Hebrew University of Jerusalem, Jerusalem, Israel Edmond and Lily Safra Center for Brain Sciences, Hebrew University of Jerusalem, Jerusalem, Israel. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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