Αρχειοθήκη ιστολογίου

Πέμπτη 7 Ιουλίου 2016

Acoustic–Phonetic Versus Lexical Processing in Nonnative Listeners Differing in Their Dominant Language

Purpose
Nonnative listeners have difficulty recognizing English words due to underdeveloped acoustic–phonetic and/or lexical skills. The present study used Boothroyd and Nittrouer's (1988) j factor to tease apart these two components of word recognition.
Method
Participants included 15 native English and 29 native Russian listeners. Fourteen and 15 of the Russian listeners reported English (ED) and Russian (RD) to be their dominant language, respectively. Listeners were presented 119 consonant–vowel–consonant real and nonsense words in speech-spectrum noise at +6 dB SNR. Responses were scored for word and phoneme recognition, the logarithmic quotient of which yielded j.
Results
Word and phoneme recognition was comparable between native and ED listeners but poorer in RD listeners. Analysis of j indicated less effective use of lexical information in RD than in native and ED listeners. Lexical processing was strongly correlated with the length of residence in the United States.
Conclusions
Language background is important for nonnative word recognition. Lexical skills can be regarded as nativelike in ED nonnative listeners. Compromised word recognition in ED listeners is unlikely a result of poor lexical processing. Performance should be interpreted with caution for listeners dominant in their first language, whose word recognition is affected by both lexical and acoustic–phonetic factors.

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Mandarin Lexical Tone Acquisition in Cochlear Implant Users With Prelingual Deafness: A Review

Purpose
The purpose of this review article is to synthesize evidence from the fields of developmental linguistics and cochlear implant technology relevant to the production and perception of Mandarin lexical tone in cochlear implant users with prelingual deafness. The aim of this review was to identify potential factors that determine outcomes for tonal-language speaking cochlear implant users and possible directions for further research.
Method
A computerized database search of MEDLINE, CINAHL, Academic Search Premier, Web of Science, and Google Scholar was undertaken in June and July 2014. Search terms used were lexical tone AND tonal language, speech development AND/OR speech production AND/OR speech perception AND cochlear implants, and pitch perception AND cochlear implants, anywhere in the title or abstract.
Conclusion
Despite the demonstrated limitations of pitch perception in cochlear implant users, there is some evidence that typical production and perception of lexical tone is possible by cochlear implant users with prelingual deafness. Further studies are required to determine the factors that contribute to better outcomes to inform rehabilitation processes for cochlear implant users in tonal-language environments.

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[The false-negative reasons of positioning test in benign paroxysmal positional vertigo].

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[The false-negative reasons of positioning test in benign paroxysmal positional vertigo].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2016 Jan;30(1):19-21

Authors: Ma X, Si F, Liu Y, Han L, Jing Y, Yu L

Abstract
OBJECTIVE: To analyze the false-negative proportion and reasons of positioning test in benign paroxysmal positional vertigo (BPPV).
METHOD: Sixty-eight cases were reviewed and analyzed during February to April 2009. All patients had typical clinical history of BPPV and diagnosed by positioning test,and all were treated with PRM successfully. If positioning test at the first time were negative, examinations repeated after either head shaking or return visits.
RESULT: Thirteen patients (19.12%) appeared false-negative in positoning test, and 11 cases showed typical nystagmus after head shaking,while 2 cases were diagnosed by return visitis the next day. There were no statistically difference between false-negative group and positive group in age (P > 0.05), gender (P > 0.05), course of disease (P > 0.05) and types of semi-circular canal (P > 0.05).
CONCLUSION: Re-examinations after head shaking or return visits are useful for the diagnosis in the suspected BPPV patients who have negative positioning test.

PMID: 27197448 [PubMed - indexed for MEDLINE]



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[The efficacy of intratympanic dexamethasone injection for the moderate and severe sudden deafness with BPPV].

Related Articles

[The efficacy of intratympanic dexamethasone injection for the moderate and severe sudden deafness with BPPV].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2015 May;29(10):934-6

Authors: Zhou X, Yu Y, Zhao Y, Wang Y, Liu Z, Liu Q

Abstract
OBJECTIVE: To evaluate the efficacy of intratympanic dexamethasone injection for the moderate and severe sudden deafness with BPPV.
METHOD: A total of 63 patients diagnosed with sudden sensorineural hearing loss with BPPV were treated through OPD. Patients were divided into three groups: 20 cases in intratympanic dexamethasone injection as initial treatment (group A); 18 cases in systemic hormone therapy group (group B); 25 cases in intratympanic dexamethasone injection as salvage treatment (group C). In addition, routine drugs were used to all patients.
RESULT: The overall effective rate of group A, B and C in hearing recovery was 60.0%, 38.9% and 48.0%, respectively: (1) No significant difference of hearing recovery was observed among three groups (P > 0.05); (2) A significant difference of hearing recovery was evidenced between group A and C (P < 0.05); (3) A significant difference of hearing recovery was evidenced between group A and C (P < 0.05); (4) No statistically significant difference was found in the hearing recovery between group B and C (P > 0.05).
CONCLUSION: Our data showed that intratympanic dexamethasone should be used as initial therapy for treating the moderate and severe sudden deafness with BPPV.

PMID: 26596013 [PubMed - indexed for MEDLINE]



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