Semantic feature degradation and naming performance. Evidence from neurodegenerative disorders
Semantic feature degradation and naming performance. Evidence from neurodegenerative disorders
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DOI：
10.1016/j.bandl.2015.05.007
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发表时间：
2015-08-01
影响因子：
2.5
通讯作者：
Cappa, Stefano F.
中科院分区：
文献类型：
--
作者：
Catricala, Eleonora;Della Rosa, Pasquale A.;Cappa, Stefano F.
阿尔茨海默氏病（AD）和原发性进行性失语症（sv-PPA）的语义变异体中无法命名物体通常归因于语义记忆丧失，并且语义特征逐渐退化。然而，并非所有特征在图片命名中都具有相同的相关性。我们分析了有或没有命名障碍的 AD 患者、使用 sv-PPA 和匹配对照的图片命名表现与语义特征丢失之间的关系，通过句子验证任务评估了独特性、语义相关性和特征类型（感觉与非感觉）的作用。结果表明，仅在所有有命名障碍的患者中，具有高语义相关性值的独特特征丢失。仅在 sv-PPA 中，具有高相关性的感觉独特特征的表现是命名表现的最佳预测指标，而在 AD 患者中未发现感觉和非感觉特征之间存在差异。 (C) 2015 Elsevier Inc. 保留所有权利。
The failure to name an object in Alzheimer's disease (AD) and in the semantic variant of the primary progressive aphasia (sv-PPA) has been generally attributed to semantic memory loss, with a progressive degradation of semantic features. Not all features, however, may have the same relevance in picture naming. We analyzed the relationship between picture naming performance and the loss of semantic features in patients with AD with or without naming impairment, with sv-PPA and in matched controls, assessing the role of distinctiveness, semantic relevance and feature type (sensorial versus non-sensorial) with a sentence verification task.The results showed that distinctive features with high values of semantic relevance were lost only in all patients with naming impairment. The performance on the sensorial distinctive features with high relevance was the best predictor of naming performance only in sv-PPA, while no difference between sensorial and non-sensorial features was found in AD patients. (C) 2015 Elsevier Inc. All rights reserved.