Sawyer Jean, Yairi Ehud
The University of Illinois at Urbana-Champaign, USA.
Am J Speech Lang Pathol. 2006 Feb;15(1):36-44. doi: 10.1044/1058-0360(2006/005).
The relationships between the length of the speech sample and the resulting disfluency data in 20 stuttering children who exhibited a wide range of disfluency levels were investigated. Specifically, the study examined whether the relative number of stuttering-like disfluencies (SLD) per 100 syllables, as well as the length of disfluencies (number of iterations per disfluent event), varied systematically across 4 consecutive, 300-syllable sections in the same speech sample. The difference in the number of SLD per 100 syllables between the early and later sections of the speech sample was statistically significant. In addition, the length of the speech sample had a critical influence on the identification of stuttering in children exhibiting relatively low levels of disfluency. Also, when a 20% difference in the number of SLD per 100 syllables was taken as a criterion, 50% of the children exhibited upward shifts in continuous speech samples that were longer than 300 syllables (i.e., 600, 900, and 1,200 syllables). Results indicated that, in general, group means for SLD grew larger as the sample size increased. The length of disfluent events did not significantly differ as the sample size increased; however, there were large differences for some children. Implications for clinicians and investigators are discussed.
对20名口吃儿童进行了研究，这些儿童口吃程度各异，研究了言语样本长度与由此产生的不流畅数据之间的关系。具体而言，该研究考察了在同一个言语样本中，每100个音节中类似口吃的不流畅（SLD）的相对数量，以及不流畅的长度（每个不流畅事件的重复次数）在连续的4个300音节部分中是否有系统变化。言语样本早期和后期每100个音节中SLD数量的差异具有统计学意义。此外，言语样本的长度对识别口吃程度相对较低的儿童的口吃情况有至关重要的影响。而且，当以每100个音节中SLD数量20%的差异作为标准时，50%的儿童在长度超过300音节（即600、900和1200音节）的连续言语样本中出现上升变化。结果表明，总体而言，随着样本量的增加，SLD的组均值增大。随着样本量增加，不流畅事件的长度没有显著差异；然而，一些儿童存在较大差异。文中还讨论了对临床医生和研究人员的启示。
