Cogn Neuropsychol. 2000 Feb 1;17(1):89-102. doi: 10.1080/026432900380508.
The extent and the impact of spared processing of facial stimuli in the prosopagnosic patient LH is examined using the inversion effect and the face context effect. Our study asked how the deficit in individual face recognition is related to two perceptual abilities that are spared in this patient but between which there is interference when both are applied to the face stimulus, i.e. structural encoding of the face and parts-based matching procedures. Three experiments studied this relationship with task demands and stimulus properties designed to trigger the parts-based processes. In the first experiment, human and animal faces are presented upright or inverted with good performance only for the inverted condition. In Experiment 2 normals show a clear face context effect (matching of upright faces easier than scrambled or inverted ones) in the full face matching task whereas in the parts matching task the face superiority effect disappears. In contrast, LH shows a face inferiority effect when matching full faces but also when matching an isolated face part to a face part in a full face context. The results show that structural encoding of the face overrules parts-based procedures that could otherwise be helpful to tell individual faces apart.
我们使用倒置效应和面孔上下文效应来检查 LH 这个面孔失认症患者对面部刺激处理的保留程度和影响。我们的研究旨在探讨个体面孔识别缺陷与两种知觉能力之间的关系，这两种知觉能力在该患者中是保留的，但当它们都应用于面孔刺激时，它们之间会产生干扰，即面孔的结构编码和基于部件的匹配过程。三个实验研究了这种关系，实验任务和刺激特性的设计旨在触发基于部件的过程。在第一个实验中，人类和动物面孔以直立或倒置的形式呈现，只有倒置的情况下表现良好。在实验 2 中，正常人在全脸匹配任务中表现出明显的面孔上下文效应（与直立面孔相比，匹配更容易），而在基于部件的匹配任务中，面孔优势效应消失。相比之下，LH 在匹配全脸时表现出面孔劣势效应，但在将孤立的面部部分与全脸背景中的面部部分进行匹配时也表现出面孔劣势效应。结果表明，面孔的结构编码会影响基于部件的过程，否则这些过程可能有助于区分个体面孔。
