Koul Rajinder, Hester Kasey
Department of Speech-Language and Hearing Sciences, Texas Tech University Health Sciences Center, Lubbock 79430, USA.
J Speech Lang Hear Res. 2006 Feb;49(1):47-57. doi: 10.1044/1092-4388(2006/004).
To examine the perception of synthetic speech by individuals with severe intellectual disabilities using a closed-response format task.
Participants were 14 individuals with severe intellectual disabilities and a group of 14 typical individuals. A between-groups design was used to compare the performance of the 2 groups on word identification accuracy and word latency tasks. Data were analyzed using a repeated measures design.
The results indicated that the performance of a group of individuals with severe intellectual disabilities was significantly poorer (p<.05) than that of typical individuals on the word identification task. Data analyzed for practice effects indicated that individuals with severe intellectual disabilities demonstrated a significant reduction (p<.01) in their word latency scores across sessions. Furthermore, there was an absence of significant effect (p>.01) of stimulus type (i.e., repeated vs. novel), indicating that individuals with intellectual disabilities are able to generalize their knowledge of the acoustic-phonetic properties of synthetic speech to novel stimuli.
This study indicates that persons with severe intellectual impairments become more proficient at recognizing synthetic speech as a result of repeated exposure to it. These results have significant clinical implications for people who use speech-generating devices.
使用封闭式反应格式任务来考察重度智力障碍者对合成语音的感知。
参与者为14名重度智力障碍者和一组14名正常个体。采用组间设计比较两组在单词识别准确性和单词潜伏期任务上的表现。数据采用重复测量设计进行分析。
结果表明，在单词识别任务上，重度智力障碍者组的表现显著差于正常个体组（p<.05）。对练习效应进行分析的数据表明，重度智力障碍者在各阶段的单词潜伏期得分显著降低（p<.01）。此外，刺激类型（即重复与新颖）不存在显著效应（p>.01），这表明智力障碍者能够将他们对合成语音的声学语音特性的知识推广到新颖刺激上。
本研究表明，重度智力障碍者由于反复接触合成语音而在识别合成语音方面变得更加熟练。这些结果对使用语音生成设备的人具有重要的临床意义。
