Thaiss L, De Bleser R
MRC Cognitive Development Unit, Aachen.
Cortex. 1992 Dec;28(4):601-21. doi: 10.1016/s0010-9452(13)80230-4.
A case study is presented of a patient with presenile dementia, for whom the dominant clinical feature from onset was a visual agnosia. The characteristics of the patient's visual agnosia were investigated in light of her apparent use of a "feature-by-feature" strategy to identify objects. Results from various tasks showed that the patient was unable to use global shape information or other grossly defined property cues characteristic of a "wide angle" attentional processing stage (Treisman, 1988) in object recognition. The patient appeared instead to rely on 'parts' or identifying features of the objects for object recognition. The patient showed significant improvement when the size of the drawing was reduced in size, thus suggesting that the disorder may be functionally localized to a reduction of the patient's attentional "spotlight".
本文呈现了一例早老性痴呆患者的病例研究，该患者从发病起的主要临床特征是视觉失认。鉴于患者明显采用“逐个特征”策略来识别物体，对其视觉失认的特征进行了研究。各项任务的结果表明，该患者在物体识别中无法使用全局形状信息或“广角”注意力处理阶段（Treisman，1988）特有的其他大致定义的属性线索。相反，患者似乎依赖物体的“部分”或识别特征来进行物体识别。当图画尺寸缩小时，患者表现出显著改善，因此表明该障碍可能在功能上局限于患者注意力“聚光灯”的缩小。
