语音节奏和语音速率对失言症理解的影响
Holly Robson1, Harriet Thomasson1, Emily Upton1
1Language and Cognition, Psychology and Language Sciences, University College London, London, UK.
失言症 (PWA) 患者对语音节奏的反应发生变化. 同时语音,虽然对控制具有挑战性,但对PWA来说破坏性较小,表明独特的理解网络交互. 语音速率的变化并不总是有利于PWA理解.
科学领域:
- 神经语言学是一种神经语言学.
- 语音和听力科学 语言和听力科学
- 认知神经科学 认知神经科学
背景情况:
- 在中风后的失言症中,语音理解缺陷与声学特性有关.
- 这项研究研究了语音节奏 (音节同步) 和语音节奏如何影响阿法西亚 (PWA) 患者的理解能力.
- 假设表明节奏性语音有助于PWA理解,通过减少时间变化和改善语音跟踪,而速度影响处理时间.
研究的目的:
- 调查语音节奏和语音速度对患有中风后失语症的个体听觉理解的差异影响.
- 确定与自然节奏相比,同时语音是否在PWA与对照组中不同地影响理解.
- 检查语音节奏在调节节律对语音理解的影响中的作用.
主要方法:
- 在两个组中,对19名PWA和38名对照参与者进行了句子验证任务.
- 句子以2x2的因数设计呈现,操纵节奏 (自然与同步) 和速度 (典型与缓慢).
- 对一个对照组 (语音退化) 的语音清晰度进行了操纵,以与PWA和一个清晰的语音控制组进行比较.
主要成果:
- 对照组的参与者表现较差的是同时节律,特别是语音退化,这表明语言线索的破坏.
- 与对照组相比,PWA因同时节律的损害较小,达到与退化语音控制组相似的理解水平.
- 两组都受到语音速度的影响,慢速同步语音比典型的同步语音更容易理解.
结论:
- 在PWA中,理解网络与语音节奏进行独特的交互,可能从同时语音的增强可预测性中受益.
- 缩减的时间预测在失语可能解释了从自然的时间结构偏差减小的负面影响.
- 减缓语音速度低于典型水平并没有始终提高PWA的理解能力.
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