MRC Cognition and Brain Sciences Unit, Cambridge, UK.
Cogn Neuropsychol. 2003 Jan 1;20(1):27-47. doi: 10.1080/02643290244000176.
In Study 1, six patients with semantic dementia were asked to produce drawings of concrete concepts from dictation of their names. The drawings were characterised by a loss of distinctive features. In the artefact domain, this feature loss resulted in representations that were increasingly box-like. In the living domain, as well as distinctive features being lost, there was a tendency for patients to include incorrect features that resulted in more familiar and "prototypical" representations. A second study included two further conditions in the drawing assessment: immediate and delayed copying of line drawings of concrete concepts. Analysis of the drawings produced by three patients with semantic dementia confirmed that overall performance was significantly influenced by the task condition (immediate delayed) and severity of disease. The rate of intruding features, but not of omitted ones, was influenced by the domain of the item, with a greater proportion of intrusions in the living than in the nonliving domain. There was also a significant effect of feature distinctiveness on the proportions of these error types: Intruded features were most likely to come from the pool of properties that are shared across domain.
在研究 1 中，要求六名语义性痴呆患者根据他们的名字进行听写，画出具体概念的图画。这些画的特点是失去了独特的特征。在人工制品领域，这种特征的丧失导致了越来越像盒子的表示。在生活领域，除了独特的特征丢失之外，患者还倾向于包含错误的特征，这导致了更熟悉和“典型”的表示。第二项研究在绘画评估中包括了另外两个条件：对具体概念的直线图画进行即时和延迟复制。对三名语义性痴呆患者所画的画的分析证实，整体表现受到任务条件（即时延迟）和疾病严重程度的显著影响。侵入特征的比率，而不是缺失特征的比率，受到项目领域的影响，生活领域的侵入特征比非生活领域多。特征的独特性对这些错误类型的比例也有显著影响：侵入的特征最有可能来自于跨领域共享的属性池。
