{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T02:08:09Z","timestamp":1790129289866,"version":"4.0.1"},"reference-count":34,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2013,10,1]],"date-time":"2013-10-01T00:00:00Z","timestamp":1380585600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The Laryngoscope"],"published-print":{"date-parts":[[2014,3]]},"abstract":"<jats:sec><jats:title>Objectives\/Hypothesis<\/jats:title><jats:p>Distinguishing muscle tension dysphonia (MTD) from adductor spasmodic dysphonia (ADSD) can be difficult. Unlike MTD, ADSD is described as \u201ctask\u2010dependent,\u201d implying that dysphonia severity varies depending upon the demands of the vocal task, with connected speech thought to be more symptomatic than sustained vowels. This study used an acoustic index of dysphonia severity (i.e., the Cepstral Spectral Index of Dysphonia [CSID]) to: 1) assess the value of \u201ctask dependency\u201d to distinguish ADSD from MTD, and to 2) examine associations between the CSID and listener ratings.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study Design<\/jats:title><jats:p>Case\u2010Control Study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>CSID estimates of dysphonia severity for connected speech and sustained vowels of patients with ADSD (n\u2009=\u200936) and MTD (n\u2009=\u200945) were compared. The diagnostic precision of task dependency (as evidenced by differences in CSID\u2010estimated dysphonia severity between connected speech and sustained vowels) was examined.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In ADSD, CSID\u2010estimated severity for connected speech (<jats:italic>M<\/jats:italic>\u2009=\u200939. 2, <jats:italic>SD<\/jats:italic>\u2009=\u200922.0) was significantly worse than for sustained vowels (<jats:italic>M<\/jats:italic>\u2009=\u200929.3, <jats:italic>SD<\/jats:italic>\u2009=\u200921.9), [<jats:italic>P<\/jats:italic>\u2009=\u2009.020]. Whereas in MTD, no significant difference in CSID\u2010estimated severity was observed between connected speech (<jats:italic>M<\/jats:italic>\u2009=\u200955.1, <jats:italic>SD<\/jats:italic>\u2009=\u200923.8) and sustained vowels (<jats:italic>M<\/jats:italic>\u2009=\u200950.0, <jats:italic>SD<\/jats:italic>\u2009=\u200927.4), [<jats:italic>P<\/jats:italic>\u2009=\u2009.177]. CSID evidence of task dependency correctly identified 66.7% of ADSD cases (sensitivity) and 64.4% of MTD cases (specificity). CSID and listener ratings were significantly correlated.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Task dependency in ADSD, as revealed by differences in acoustically\u2010derived estimates of dysphonia severity between connected speech and sustained vowel production, is a potentially valuable diagnostic marker.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of Evidence<\/jats:title><jats:p>3b. <jats:italic>Laryngoscope<\/jats:italic>, 124:718\u2013724, 2014<\/jats:p><\/jats:sec>","DOI":"10.1002\/lary.24362","type":"journal-article","created":{"date-parts":[[2013,8,14]],"date-time":"2013-08-14T16:53:28Z","timestamp":1376499208000},"page":"718-724","source":"Crossref","is-referenced-by-count":48,"title":["Automated acoustic analysis of task dependency in adductor spasmodic dysphonia versus muscle tension dysphonia"],"prefix":"10.1002","volume":"124","author":[{"given":"Nelson","family":"Roy","sequence":"first","affiliation":[{"name":"Department of Communication Sciences and Disorders The University of Utah Salt Lake City Utah U.S.A"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alqhazo","family":"Mazin","sequence":"additional","affiliation":[{"name":"Department of Communication Sciences and Disorders The University of Utah Salt Lake City Utah U.S.A"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shaheen N.","family":"Awan","sequence":"additional","affiliation":[{"name":"Department of Audiology &amp; Speech\u2013Language Pathology Bloomsburg University of Pennsylvania Bloomsburg Pennsylvania U.S.A"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,10]]},"reference":[{"key":"e_1_2_7_2_1","first-page":"411","volume-title":"Quality Measurement","author":"Cannito MP","year":"2000"},{"key":"e_1_2_7_3_1","first-page":"248","volume-title":"Neurologic Disorders of the Larynx","author":"Brin 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