A NEW PROTOCOL FOR ASSESSING VISEME PERCEPTION IN SENTENCE CONTEXT - THE LIPREADING DISCRIMINATION TEST
A NEW PROTOCOL FOR ASSESSING VISEME PERCEPTION IN SENTENCE CONTEXT - THE LIPREADING DISCRIMINATION TEST
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DOI：
10.1097/00003446-198802000-00014
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发表时间：
1988-02-01
期刊：
影响因子：
3.7
通讯作者：
GARRISON, W
中科院分区：
文献类型：
--
作者：
BEMENT, L;WALLBER, J;GARRISON, W
46名听力受损的年轻人用一种新开发的仪器进行了测试，该仪器需要辨别反应来评估视音知觉作为唇读表现的一个组成部分。刺激物是录像句子，这些句子在一半的试验中与目标句子不同，句子中间嵌入了一个viseme。测试了六个视觉类别的辨别能力：粗音节模式，辅音发音-舌头，元音发音-极端唇形，元音发音-分级唇形，元音发音-下颌运动。测试数据采用项目反应理论模型进行分析。结果表明，测试数据符合Rasch模型对人体测量的期望。研究对象的考试成绩与沟通特征之间的关系。数据提供证据表明，测试方案，在这个早期发展阶段，是有用的评估至少一个感知成分的唇读性能。
Forty-six hearing-impaired young adults were tested with a newly developed instrument that requires a discrimination response to assess viseme perception as a component of lipreading performance. Stimuli were videotaped sentences that differed on half of the trials from a captioned target sentence by one viseme embedded in the middle of the sentence. Discrimination within six visual categories was tested: gross syllable pattern, consonant articulation-tongue, vowel articulation-extreme lip shapes, vowel articulation -graded lip shapes, and vowel articulation-jaw movement. Test data were analyzed using an item response theory model. The results indicated that the test data conformed to the expectations of the Rasch model for person measurement. Relationships among subjects'' test scores and communication characteristics also were examined. The data provide evidence that the test protocol, at this early stage of development, is useful for assessing at least one perceptual component of lipreading performance.