Vrtunski P B, Martinez M, Boller F
Cortex. 1979 Jun;15(2):337-41. doi: 10.1016/s0010-9452(79)80038-6.
The effect of Delayed Auditory Feedback (DAF) on speech duration was evaluated subjectively and measured objectively in 30 subjects (10 normals, 10 nonfluent aphasics and 10 fluent aphasia). The average correlation coefficient between the subjective and objective data was .52 for 180 msec. delay and .46 for 360 msec. delay. Analysis of variance of data derived from the two methods showed the same highly significant differences among groups, delay and tasks. We conclude from these results that both objective and subjective procedures are equally useful in evaluating DAF effect on speech duration, and that both may also be valuable in assessing other types of behavior.
在30名受试者（10名正常人、10名非流利性失语症患者和10名流利性失语症患者）中，对延迟听觉反馈（DAF）对言语时长的影响进行了主观评估和客观测量。对于180毫秒的延迟，主观数据与客观数据之间的平均相关系数为0.52；对于360毫秒的延迟，平均相关系数为0.46。对两种方法得出的数据进行方差分析，结果显示在组间、延迟和任务方面存在同样高度显著的差异。从这些结果我们得出结论，客观和主观程序在评估DAF对言语时长的影响方面同样有用，并且在评估其他类型的行为时也可能有价值。
