Onslow M, van Doorn J, Newman D
School of Communication Disorders, University of Sydney, Australia.
J Speech Hear Res. 1992 Jun;35(3):529-36. doi: 10.1044/jshr.3503.529.
Existing literature suggests that one of the effects of treatment based on prolonged speech is increased durations of acoustic segments. However, the external validity of the data concerned may be questioned because the data were not based on spontaneous speech samples and were gathered from subjects with unknown treatment histories. With this in mind, the present investigation used young clients with no history of treatment based on prolonged speech and obtained pretreatment and posttreatment acoustic measures from spontaneous speech samples. Acoustic measures showed no significant posttreatment increases in durations of acoustic segments. However, for the acoustic measure of vowel duration and a measure of articulation rate, posttreatment speech samples showed significantly reduced variability. The potential theoretical and practical relevance of these findings is discussed.
现有文献表明，基于延长语音的治疗效果之一是增加声学片段的时长。然而，相关数据的外部有效性可能受到质疑，因为这些数据并非基于自然言语样本，而是从治疗史不明的受试者中收集的。考虑到这一点，本研究采用了没有基于延长语音治疗史的年轻受试者，并从自然言语样本中获取了治疗前和治疗后的声学测量数据。声学测量结果显示，治疗后声学片段的时长没有显著增加。然而，对于元音时长的声学测量和发音速率的测量，治疗后的言语样本显示变异性显著降低。本文讨论了这些发现潜在的理论和实际意义。
