@article{oai:repo.lib.tut.ac.jp:00000259,
 author = {ウジヒラ, アキラ and 氏平, 明 and Ujihira, Akira},
 journal = {雲雀野, The Lark Hill},
 month = {Mar},
 note = {P(論文), Regarding stuttering as one of the laryngeal condition defects, this paper attempts to illuminate the background of the natural recovery. They say that it is observed at the rate of 70～80% of all the stuttering children in preschool and school days. The cause, the process, and the trigger of the natural recovery have not been uncovered yet. According to the previous study (氏平 2000), disfluency occurs from two kinds of the stages; one is the phonological encoding stage and the other is the articulator stage. A lot of previous studies (Hulstein & Vanlieshout 1998 and etc.) told us that the stage where stuttering took place should be the articulator one. An easy ways to look for the stage is to analyze an acoustic aspect of the voice. Detected pathological voices are the sign of an abnormal laryngeal condition. 22 stuttering preschool children and 5 controls, 18 schooled stutterers and 8 controls are examined with the acoustic analysis. The general result shows that preschool stutterers' APQ (Amplitude Perturbation Quetient) and SP (Shimmer Parameter) are abnormal, but school aged stutterers' are not so abnormal as preschool stutterers'. In comparison with the previous studies on adult stutterers (氏平 1998, 2000), the adult stutterers' voices were as pathological as preschool stutterers'. It suggests that a conciderable number of adult stutterers have something wrong with keeping stable amplitude of the voice from preschool days. In other words, breath and laryngeal control should be their weak point. In school days children experience breaking of voice and often speak loudly. It is a very good exercise of doing voice. So some of the preschool stutterers who experience it may get out of stuttering and become normal speakers.},
 pages = {1--10},
 title = {吃音の自然治癒の背景について},
 volume = {28},
 year = {2006}
}