ASSESSMENT OF A MEASURE OF RESPONSE CONFIDENCE FOR
A SPEECH RECOGNITION TASK IN NOISE <p>
JOHN ANDREW DUNDAS <p>
Dissertation under the direction of Gary P Jacobson, Ph.D.
<p>
The development of a measure of response confidence for a speech understanding task is presented in this dissertation. Normal hearing participants completed speech understanding tasks in background noise and rated confidence in their responses. In experiment 1, the relationships between measured performance, perceived performance and confidence in the correctness of responses were investigated. In experiment 2, the effect of sentence context on response confidence was investigated. The main findings of this study are; 1. Confidence ratings of speech intelligibility performance can be consistently measured using simple tools, 2. Confidence ratings are strongly correlated with measured performance, 3. Confidence ratings are highly repeatable, 4. Sentence based test materials with a high degree of context result in the most accurate calibration to measured performance, and, 5. Low context sentences result in a faster growth of confidence (i.e., overconfidence). These findings suggest that confidence ratings could be a useful outcome measure in the evaluation of treatment efficacy in the hearing impaired population.
| Identifer | oai:union.ndltd.org:VANDERBILT/oai:VANDERBILTETD:etd-12102009-175121 |
| Date | 17 December 2009 |
| Creators | Dundas, John Andrew |
| Contributors | Troy A Hackett, Gary P Jacobson, Todd A Ricketts, Benjamin W.Y. Hornsby |
| Publisher | VANDERBILT |
| Source Sets | Vanderbilt University Theses |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.vanderbilt.edu/available/etd-12102009-175121/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Vanderbilt University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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