Bement L, Wallber J, DeFilippo C, Bochner J, Garrison W
National Technical Institute for the Deaf, Rochester Institute of Technology, New York.
Ear Hear. 1988 Feb;9(1):33-40. doi: 10.1097/00003446-198802000-00014.
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--lips, 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.
46名听力受损的年轻人接受了一种新开发仪器的测试，该仪器需要通过辨别反应来评估视位感知，以此作为唇读能力的一个组成部分。刺激材料是录像句子，在一半的试验中，这些句子与带字幕的目标句子相比，在句子中间嵌入了一个不同的视位。测试了六个视觉类别的辨别能力：总体音节模式、辅音发音——嘴唇、辅音发音——舌头、元音发音——极端唇形、元音发音——渐变唇形以及元音发音——下颌运动。使用项目反应理论模型对测试数据进行了分析。结果表明，测试数据符合用于人员测量的拉施模型的预期。还研究了受试者测试分数与沟通特征之间的关系。数据表明，在开发的这个早期阶段，该测试方案至少对于评估唇读能力的一个感知成分是有用的。
