通过基于模型的项目选择来评估相对语言障碍
Grant M Walker1, Julius Fridriksson2, Gregory Hickok1,3
1Department of Cognitive Sciences, University of California, Irvine.
概括
一个新的图片命名测试,相对语言障碍 (RLI) 评分,准确地评估中风患者的贫血症严重程度. RLI评分可以预测语音流性和大脑激活模式,这对于临床评估非常有用.
科学领域:
- 神经科学是一个神经科学.
- 心理语言学 心理语言学
- 临床神经学 临床神经学
背景情况:
- 贫血,左半球中风后的常见缺陷,损害了词汇检索.
- 现有的测试可能无法准确区分词汇和副词汇处理缺陷.
研究的目的:
- 引入和心理验证一种新的图片命名测试,以评估特定的命名障碍.
- 开发相对语言障碍 (RLI) 评分,以量化词汇和副词汇处理缺陷.
主要方法:
- 使用计算模型构建了针对词汇和子词汇单词检索的两个项目集.
- 对91名患有贫血的慢性左半球中风患者进行RLI测试.
- 评估RLI得分对语言行为,损伤位置和大脑激活的心理测量属性和预测有效性进行评估.
主要成果:
- RLI得分显示了足够的心理测量特性和临床意义.
- RLI分数预测了自发的言语流性,超出了整体准确度.
- 在RLI表现与其他语言测试之间发现了分离;亚词汇RLI与言语不良和围病变相关,而词汇RLI与深白质病变相关.
- 功能性脑成像显示,在命名过程中,背部和腹部网络中与RLI相关的激活转移.
结论:
- RLI评估是评估贫血的心理测量健全的临床工具.
- RLI提供了关于中风幸存者的词汇检索缺陷的神经基础的见解.
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