Lozano R A, Dreyer D E
J Commun Disord. 1978 Sep;11(5):407-15. doi: 10.1016/0021-9924(78)90033-3.
This investigation was designed to determine if delayed auditory feedback (DAF) might have a facilitating effect on dyspraxic speech. Five subjects with dyspraxia of speech and minimal aphasic involvement were used. Two reading tasks were administered under conditions of DAF and no DAF. Reading tasks were constructed of 24 monosyllabic words with initial consonant clusters and 10 polysyllabic words. Three experienced judges scored word production, consonant cluster production, and 12 types of production errors. Temporal duration of word productions was measured in both conditions. No significant differences between the conditions were found in any of the measured parameters. There was no demonstrable improvement of dyspraxia of speech errors under DAF. Contrary to earlier research, distortions rather than phonemic substitutions were found to be the most frequently occurring articulatory errors.
本研究旨在确定延迟听觉反馈（DAF）是否可能对言语失用症患者的言语产生促进作用。研究选取了5名患有言语失用症且失语症影响极小的受试者。在有DAF和无DAF的条件下进行了两项阅读任务。阅读任务由24个带有初始辅音群的单音节词和10个多音节词组成。三名经验丰富的评判员对单词产出、辅音群产出和12种产出错误类型进行评分。在两种条件下均测量了单词产出的时间长度。在所测量的任何参数中，两种条件之间均未发现显著差异。在DAF条件下，言语失用症错误没有得到明显改善。与早期研究相反，发现扭曲而非音素替代是最常出现的发音错误。
