a Eye and Brain Mapping Laboratory (iBMLab), Department of Psychology , University of Fribourg , Fribourg , Switzerland.
Cogn Neuropsychol. 2018 Jul-Sep;35(5-6):304-313. doi: 10.1080/02643294.2018.1469482. Epub 2018 May 11.
Determining the familiarity and identity of a face have been considered as independent processes. Covert face recognition in cases of acquired prosopagnosia, as well as rapid detection of familiarity have been taken to support this view. We tested P.S. a well-described case of acquired prosopagnosia, and two healthy controls (her sister and daughter) in two saccadic reaction time (SRT) experiments. Stimuli depicted their family members and well-matched unfamiliar distractors in the context of binary gender, or familiarity decisions. Observers' minimum SRTs were estimated with Bayesian approaches. For gender decisions, P.S. and her daughter achieved sufficient performance, but displayed different SRT distributions. For familiarity decisions, her daughter exhibited above chance level performance and minimum SRTs corresponding to those reported previously in healthy observers, while P.S. performed at chance. These findings extend previous observations, indicating that decisional space determines performance in both the intact and impaired face processing system.
确定面孔的熟悉度和身份被认为是两个独立的过程。获得性面孔失认症病例中的内隐面孔识别，以及对熟悉度的快速检测，都支持这一观点。我们测试了 P.S.，一位描述详尽的获得性面孔失认症患者，以及两位健康对照者（她的妹妹和女儿）在两个眼跳反应时间（SRT）实验中的表现。刺激物描绘了他们的家庭成员和匹配良好的陌生干扰项，呈现于二元性别或熟悉度判断的情境中。观察者的最小 SRT 使用贝叶斯方法进行估计。对于性别判断，P.S.和她的女儿表现出足够的能力，但显示出不同的 SRT 分布。对于熟悉度判断，她的女儿表现出高于机会水平的表现和与健康观察者先前报告的最小 SRT 相对应，而 P.S.则表现出随机水平。这些发现扩展了先前的观察结果，表明决策空间决定了完整和受损的面孔处理系统的表现。
