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  Is it positive or negative? On determining ERP components

beim Graben, P., & Frisch, S. (2004). Is it positive or negative? On determining ERP components. IEEE Transactions on Biomedical Engineering, 51(8), 1374-1382. doi:10.1109/TBME.2004.827558.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-C034-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-27DD-F
Genre: Journal Article

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bgraben_frisch_2004.pdf (Publisher version), 9MB
 
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 Creators:
beim Graben, Peter, Author
Frisch, Stefan1, Author              
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1Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              

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Free keywords: Coherence; Component definition; Event-related potentials (ERP); Half wave encoding; Symbolic dynamics; Word statistics
 Abstract: In most experiments using event-related brain poten- tials (ERPs), there is a straightforward way to define—on theoret- ical grounds—which of the conditions tested is the experimental condition and which is the control condition. If, however, theoret- ical assumptions do not give sufficient and unambiguous informa- tion to decide this question, then the interpretation of an ERP effect becomes difficult, especially if one takes into account that certain effects can be both a positivity or a negativity on the basis of the morphology of the pattern as well as with respect to peak latency (regard for example, N400 and P345). Exemplified with an ERP experiment on language processing, we present such a critical case and offer a possible solution on the basis of nonlinear data analysis. We show that a generalized polarity histogram, the word statistics of symbolic dynamics, is in principle able to distinguish negative going ERP components from positive ones when an appropriate encoding strategy, the half wave encoding is employed. We pro- pose statistical criteria which allow to determine ERP components on purely methodological grounds

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Language(s): eng - English
 Dates: 2004
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 239712
Other: P7081
DOI: 10.1109/TBME.2004.827558
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Title: IEEE Transactions on Biomedical Engineering
Source Genre: Journal
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Publ. Info: New York, NY : Institute of Electrical and Electronics Engineers
Pages: - Volume / Issue: 51 (8) Sequence Number: - Start / End Page: 1374 - 1382 Identifier: ISSN: 0018-9294
CoNE: /journals/resource/991042742034490