Phonological encoding in apraxia of speech and aphasia.
Phonological encoding in apraxia of speech and aphasia.
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DOI：
10.1080/02687038.2013.850651
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发表时间：
2014
期刊：
影响因子：
2
通讯作者：
Gutiérrez K
中科院分区：
文献类型：
--
作者：
Maas E;Ballard KJ;Gutiérrez K
言语失用症(AOS)被认为是一种言语运动规划/编程障碍。虽然可能存在共生的语音障碍，但言语运动计划/编程缺陷往往使直接评估语音编码阶段变得困难。使用在线方法的研究表明，语音信息的激活在AOS中可能会持续很长时间。本研究旨在探讨AOS和失语症患者语音编码阶段的完整性。我们检验了两个具体的假设，框架假说和分段假说。根据框架假说，AOS说话人在提取韵律帧(如音节数量)方面存在障碍；根据分段假说，AOS说话人在提取语段(如辅音)方面存在障碍。四名患有自闭症和不同程度失语的人、两名失语症患者和13名年龄匹配的对照受试者完成了一项在线启动任务。在这项任务中，参与者将不同音节(例如，阳台-椰子-签名和阳台-胡萝卜袜子)、声母(例如，木匠-城堡-笼子和木匠-海狸-太阳)或两者都有的图片命名(例如，回旋镖-蝴蝶-自行车和回旋镖-香肠-猫)。测量错误率和反应时间。对照的数据复制了以前的文献。反应时数据支持有AOS的说话者和一个有失语症的无AOS的说话者的分段假设，与另一个有失语症的无AOS的说话者的模式没有差异。这些结果表明，有AOS的说话者在语音编码阶段也可能存在困难。对这些发现的理论和临床意义进行了讨论。
Apraxia of speech (AOS) is considered a speech motor planning/programming disorder. While it is possible that co-occurring phonological impairments exist, the speech motor planning/programming deficit often makes it difficult to assess the phonological encoding stage directly. Studies using on-line methods have suggested that activation of phonological information may be protracted in AOS. The present study was designed to investigate the integrity of the phonological encoding stage in AOS and aphasia. We tested two specific hypotheses, the Frame Hypothesis and the Segment Hypothesis. According to the Frame Hypothesis, speakers with AOS have an impairment in retrieving metrical frames (e.g., number of syllables); according to the Segment Hypothesis, speakers with AOS have an impairment in retrieving segments (e.g., consonants). Four individuals with AOS and varying degrees of aphasia, two speakers with aphasia, and 13 age-matched control speakers completed an on-line priming task in which participants name pictures in sets that do or do not share number of syllables (e.g., balcony-coconut-signature vs. balcony-carrot-sock), the initial consonant (e.g., carpenter-castle-cage vs. carpenter-beaver-sun), or both (e.g., boomerang-butterfly-bicycle vs. boomerang-sausage-cat). Error rates and reaction times were measured. Data for controls replicated previous literature. Reaction time data supported the Segment Hypothesis for speakers with AOS and for one speaker with aphasia without AOS, with no differences in pattern from controls for the other speaker with aphasia without AOS. These results suggest that speakers with AOS may also have difficulties at the phonological encoding stage. Theoretical and clinical implications of these findings are discussed.
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DOI：
10.1037/a0021322
发表时间：
2011-01-01
影响因子：
2.6
作者：
Cholin, Joana;Dell, Gary S.;Levelt, Willem J. M.
通讯作者：
Levelt, Willem J. M.
影响因子：
4.3
作者：
Cholin, J;Schiller, NO;Levelt, WJM
通讯作者：
Levelt, WJM
DOI：
10.1044/jshr.2602.231
发表时间：
1983-01-01
期刊：
JOURNAL OF SPEECH AND HEARING RESEARCH
影响因子：
--
作者：
KENT, RD;ROSENBEK, JC
通讯作者：
ROSENBEK, JC
影响因子：
3.4
作者：
Crawford, John R.;Garthwaite, Paul H.
通讯作者：
Garthwaite, Paul H.
影响因子：
3.4
作者：
Crawford, John R.;Garthwaite, Paul H.;Porter, Sara
通讯作者：
Porter, Sara