Adams M R, Hayden P
J Speech Hear Res. 1976 Jun;19(2):290-6. doi: 10.1044/jshr.1902.290.
This study tested the hypothesis that stutterers have difficulty initiating and terminating phonation independent of the acts of running speech and stuttering. Ten young adult stutterers served as the experimental group. They were matched as a group for age and sex with 10 normal speakers. Subjects from both groups were tested individually. The experimental task required that subjects start and stop phonation as quickly as possible upon hearing each member of a seried of 1000-Hz pure tones appear and then disappear. Subjects' vocalizations were permanently recorded on an optical oscillograph. Results showed that both groups improved (shortened) their voice initiation and termination times from the beginning to the end of the experiment. Typically, however, the stutterers were significantly slower than the control subjects on most of the temporal measures.
口吃者在独立于连贯言语和口吃行为的情况下，开始和结束发声存在困难。十名年轻成年口吃者作为实验组。他们在年龄和性别上与十名正常说话者作为一组进行匹配。两组受试者均单独进行测试。实验任务要求受试者在听到一系列1000赫兹纯音中的每一个音出现然后消失时，尽快开始和停止发声。受试者的发声被永久记录在光学示波器上。结果显示，从实验开始到结束，两组受试者的起声和终声时间都有所改善（缩短）。然而，在大多数时间测量指标上，口吃者通常明显比对照组受试者慢。
