Document Detail

Phonemic restoration in a sentence context: evidence from early and late ERP effects.
MedLine Citation:
PMID:  17027933     Owner:  NLM     Status:  MEDLINE    
When a particular speech sound is obliterated and replaced by a non-speech sound in continuous speech the listener may not notice any disturbance in speech or have difficulties in understanding the word. The present study examined for the first time neurophysiological correlates of the perception of words with an obliterated initial phoneme. Behavioral responses and event-related potentials (ERPs) were measured while participants listened to naturally spoken sentences which had a highly or less expected final word. Half of the sentences were manipulated to have a cough replacing the beginning of the final word, thus, reducing the initial phonetic information available for the word recognition. An N1-P2 complex indicated an automatic registration of the cough's onset. An early negativity to less expected relative to highly expected words was observed for phonetically intact words but not for manipulated words. Although the N400 effect to manipulated words was elicited later than to intact words, after the fragment onset, its amplitude was not enhanced. Further, no significant enhancement of the N400 was found for the manipulated highly expected words. This finding, together with behavioral results, indicated an easier integration of the manipulated highly expected words with the sentence context than of intact but less expected words. Taken together, the study demonstrates an efficient usage of both a context-driven expectancy of the suitable word as well as a stimulus-driven processing of the phonetic information during online perception of speech. The present ERP results support the earlier behavioral research in showing that phonemic restoration is not a bottom-up phenomenon but rather reflects a top-down repair process.
Päivi Sivonen; Burkhard Maess; Sonja Lattner; Angela D Friederici
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-10-09
Journal Detail:
Title:  Brain research     Volume:  1121     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2006-11-14     Completed Date:  2007-02-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  177-89     Citation Subset:  IM    
Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.
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MeSH Terms
Acoustic Stimulation
Evoked Potentials / physiology*
Fixation, Ocular
Functional Laterality

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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