Bislick Lauren, McNeil Malcolm, Spencer Kristie A, Yorkston Kathryn, Kendall Diane L
Department of Communication Sciences and Disorders, University of Central Florida, Orlando.
Department of Communication Sciences and Disorders, University of Pittsburgh, PennsylvaniaVeterans Administration Pittsburgh Health Care System, Pennsylvania.
Am J Speech Lang Pathol. 2017 Jun 22;26(2S):611-630. doi: 10.1044/2017_AJSLP-16-0080.
The primary characteristics used to define acquired apraxia of speech (AOS) have evolved to better reflect a disorder of motor planning/programming. However, there is debate regarding the feature of relatively consistent error location and type.
Ten individuals with acquired AOS and aphasia and 11 individuals with aphasia without AOS participated in this study. In the context of a 2-group experimental design, error consistency was examined via 5 repetitions of 30 multisyllabic words. The influence of error rate, severity of impairment, and stimulus presentation condition (blocked vs. random) on error consistency was also explored, as well as between-groups differences in the types of errors produced.
Groups performed similarly on consistency of error location; however, adults with AOS demonstrated greater variability of error type in a blocked presentation condition only. Stimulus presentation condition, error rate, and severity of impairment did not influence error consistency in either group. Groups differed in the production of phonetic errors (e.g., sound distortions) but not phonemic errors.
Overall, findings do not support relatively consistent errors as a differentiating characteristic of AOS.
用于定义获得性言语失用症（AOS）的主要特征已经演变，以更好地反映运动计划/编程障碍。然而，关于相对一致的错误位置和类型的特征存在争议。
10名患有获得性AOS和失语症的个体以及11名没有AOS的失语症个体参与了本研究。在两组实验设计的背景下，通过对30个多音节词进行5次重复来检查错误一致性。还探讨了错误率、损伤严重程度和刺激呈现条件（分组呈现与随机呈现）对错误一致性的影响，以及两组产生的错误类型之间的差异。
两组在错误位置的一致性方面表现相似；然而，只有在分组呈现条件下，患有AOS的成年人表现出更大的错误类型变异性。刺激呈现条件、错误率和损伤严重程度在两组中均未影响错误一致性。两组在语音错误（如声音扭曲）的产生上存在差异，但在音素错误上没有差异。
总体而言，研究结果不支持相对一致的错误作为AOS的鉴别特征。
