Bradyphrenia and bradykinesia both contribute to altered speech in schizophrenia - A quantitative acoustic study
Bradyphrenia and bradykinesia both contribute to altered speech in schizophrenia - A quantitative acoustic study
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DOI：
10.1097/01.wnn.0000185278.21352.e5
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发表时间：
2005-12-01
影响因子：
1.4
通讯作者：
Snyder, PJ
中科院分区：
文献类型：
--
作者：
Cannizzaro, MS;Cohen, H;Snyder, PJ
目的：评估运动和认知症状对精神分裂症（SZ）患者言语输出的相对贡献。背景：对 SZ 患者言语输出的研究表明，非典型韵律（例如停顿）与表现为平淡情感和失语的临床症状相关。其他人则提出，更普遍的运动减慢、运动迟缓会导致可测量的言语变化。方法：13 名患有 SZ 的参与者和年龄匹配的对照受试者被纳入组间比较和按任务比较。对两个级别的任务复杂性进行声学分析，以确定言语停顿的独特和重叠特征。结果：对于自由言语任务组，在平均停顿持续时间、停顿变异性、停顿百分比和累积停顿时间的测量上发现了差异。相反，对于死记硬背的言语任务，仅在平均停顿持续时间和停顿变异性的测量上发现了组间差异。结论：在患有精神错乱的人中，停顿持续时间的平均和变异性的差异可能反映在言语运动减慢中，而更全面的测量（例如，停顿百分比）可能更好地反映了与自由言语的认知语言方面相关的思想和想法生成的缺乏。这些发现证实并扩展了 SZ 缺乏思维假设，将运动减慢对言语产生的影响包括在内。
Objective: To evaluate the relative contributions of motor and cognitive symptoms on speech output in persons with schizophrenia (SZ).Background: Studies of speech production in SZ suggest that atypical prosody (eg, pause) is related to clinical symptoms manifest in flat affect and alogia. Others have suggested that a more general motor slowing, bradykinesia, leads to measurable speech changes.Method: Thirteen participants with SZ and age-matched control subjects were included for between-group and by-task comparisons. Two levels of task complexity were analyzed acoustically to determine distinct and overlapping features of speech pause.Results: For the free-speech task group differences were found on, measures of average pause duration, pause variability, percent pause, and cumulative pause time. Conversely, for the rote-speech task, group differences were found only on measures of average pause duration and pause variability.Conclusions: In persons with SZ, differences in the average and variability of pause duration may be reflected in speech motor slowing, whereas more global measures (eg, percentage pause) may better reflect a paucity of thought and idea generation related to the cognitive-linguistic aspects of free speech. These findings corroborate and extend the paucity of thought hypothesis in SZ to include an influence of motor slowing on speech production.