Processing of English words with fine acoustic contrasts and simple tones: A mismatch negativity study

Pettigrew, Catharine M., Murdoch, Bruce M., Kei, Joseph, Chenery, Helen J., Sockalingam, Ravi, Ponton, Curtis W., Finnigan, Simon and Alku, Paavo (2004) Processing of English words with fine acoustic contrasts and simple tones: A mismatch negativity study. Journal of the American Academy of Audiology, 15 1: 47-66. doi:10.3766/jaaa.15.1.6


Author Pettigrew, Catharine M.
Murdoch, Bruce M.
Kei, Joseph
Chenery, Helen J.
Sockalingam, Ravi
Ponton, Curtis W.
Finnigan, Simon
Alku, Paavo
Title Processing of English words with fine acoustic contrasts and simple tones: A mismatch negativity study
Journal name Journal of the American Academy of Audiology   Check publisher's open access policy
ISSN 1050-0545
Publication date 2004-01
Sub-type Article (original research)
DOI 10.3766/jaaa.15.1.6
Volume 15
Issue 1
Start page 47
End page 66
Total pages 20
Editor J Jerger
Place of publication McLean, VA., U.S.A.
Publisher American Academy of Audiology
Collection year 2004
Language eng
spa
Subject C1
321025 Rehabilitation and Therapy - Hearing and Speech
730111 Hearing, vision, speech and their disorders
1103 Clinical Sciences
Abstract The purpose of this study was to compare the robustness of the event-related potential (ERP) response, called the mismatch negativity (MMN), when elicited by simple tone stimuli (differing in frequency, duration, or intensity) and speech stimuli (CV nonword contrast /de:/ vs. /ge:/ and CV word contrast /deI/ vs. /geI/). The study was conducted using 30 young adult subjects (Groups A and B; n = 15 each). The speech stimuli were presented to Group A at a stimulus onset asynchrony (SOA) of 610 msec and to Group B at an SOA of 900 msec. The tone stimuli were presented to both groups at an SOA of 610 msec. MMN responses were elicited by the simple tone stimuli (66.7%-96.7% of subjects with MMN "present," or significantly different from zero, p < 0.05) but not the speech stimuli (10% subjects with MMN present for nonwords, 10% for words). The length of the SOA (610 msec or 900 msec) had no effect on the ability to obtain consistent MMN responses to the speech stimuli. The results indicated a lack of robust MMN elicited by speech stimuli with fine acoustic contrasts under carefully controlled methodological conditions. The implications of these results are discussed in relation to conflicting reports in the literature of speech-elicited MMNs, and the importance of appropriate methodological design in MMN studies investigating speech processing in normal and pathological populations.
Keyword Consonant-vowel tokens
Event-related potential
Mismatch negativity
Simple tones
Stimulus onset asynchrony
Words
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 04:49:42 EST