| Does knowledge of medical diagnosis bias auditory-perceptual judgments of dysphonia? | |
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MedLine Citation:
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PMID: 20347262 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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OBJECTIVE/HYPOTHESIS: To determine whether knowledge of medical diagnosis biases listeners with varied experience levels in their judgments of dysphonia. STUDY DESIGN: Prospective, mixed experimental and comparative design. METHODS: Twenty-six speakers with dysphonia and four normal controls provided speech recordings. Twenty novice and eight experienced clinicians evaluated speech samples for roughness and breathiness using 100-mm visual analog scales. In one condition, the speech samples were presented without diagnostic information; in the second condition, samples were presented in conjunction with the medical diagnosis. RESULTS: Regardless of experience level, listeners judged the samples as significantly more severe when the speakers' diagnoses were known. Specifically, novice listeners (NLs) significantly increased the severity of judgments for speakers who were mildly breathy or mildly or moderately rough when diagnostic information was known. In addition, listeners in both groups judged speakers with mass lesions to be significantly rougher when diagnosis was known; this bias was not observed for speakers with other diagnoses. NLs also trended toward increasing the severity of breathiness judgments for individuals with known vocal fold paralysis but not other diagnoses. CONCLUSIONS: Sources of bias such as knowledge of medical diagnoses should be considered when listeners with varied experience levels use auditory-perceptual measures to evaluate dysphonia. |
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Authors:
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Tanya Eadie; Alicia Sroka; Derek R Wright; Albert Merati |
Publication Detail:
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Type: Journal Article Date: 2010-03-26 |
Journal Detail:
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Title: Journal of voice : official journal of the Voice Foundation Volume: 25 ISSN: 1557-8658 ISO Abbreviation: J Voice Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-06-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8712262 Medline TA: J Voice Country: United States |
Other Details:
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Languages: eng Pagination: 420-9 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 The Voice Foundation. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Department of Speech and Hearing Sciences, University of Washington, Seattle, Washington. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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