Macleod J, Kalinowski J, Stuart A, Armson J
School of Human Communication Disorders, Dalhousie University, Halifax, NS, Canada.
J Commun Disord. 1995 Sep;28(3):217-28. doi: 10.1016/0021-9924(94)00010-w.
The purpose of this study was to determine if combining delayed auditory feedback (DAF) and frequency altered feedback (FAF) would enhance fluency more than either DAF or FAF alone. Ten stutterers read at normal and fast speech rates under nonaltered auditory feedback (NAF), DAF (i.e., a 50 ms delay), FAF (i.e., a one half octave downward shift), and a combination of DAF and FAF [(COMBO), i.e., a 50 ms delay plus a one half octave downward shift]. Results indicated that stuttering frequency was significantly reduced under all altered auditory conditions at high speech rates relative to the NAF condition. There were, however, no significant differences between the altered auditory feedback conditions (i.e., DAF, FAF, and COMBO). It is suggested that further studies be undertaken to explore the combination of altered auditory feedback conditions, as it may be the case that a floor effect was demonstrated with the singular presentations of DAF and FAF and further improvements in fluency enhancement could not be exhibited in the combined condition. Finally, these findings support the notion that a slowed rate of speech is not necessary for fluency enhancement under conditions of altered auditory feedback.
本研究的目的是确定延迟听觉反馈（DAF）和频率改变反馈（FAF）相结合是否比单独使用DAF或FAF更能提高流畅性。十名口吃者在正常语速和快速语速下，分别在未改变的听觉反馈（NAF）、DAF（即50毫秒延迟）、FAF（即向下半音程偏移）以及DAF和FAF的组合（[COMBO]，即50毫秒延迟加上向下半音程偏移）条件下进行朗读。结果表明，在高语速下，相对于NAF条件，所有改变听觉的条件下口吃频率均显著降低。然而，改变听觉反馈条件（即DAF、FAF和COMBO）之间没有显著差异。建议进一步开展研究，探索改变听觉反馈条件的组合，因为可能存在这样的情况，即DAF和FAF的单独呈现显示出了下限效应，并且在组合条件下无法表现出流畅性增强的进一步改善。最后，这些发现支持了这样一种观点，即在改变听觉反馈的条件下，语速减慢对于提高流畅性并非必要。
