Visual psychophysics of human face processing

描述（由申请人提供）：在研究中假设 有不同的子系统或模块的愿景。在视野中 物体识别在这个问题中表现得最为明显--人脸 特别吗？这可以分为两个研究问题。(1)是否 面部处理根据相同或不同的计算 原则作为处理其他对象？(2)是否有单独的 用于处理面部图像的视觉系统中的解剖区域， 与处理视觉对象不同吗为了解决这些基本问题， 问题，我们转向视觉心理物理学，它已经证明了自己，无论是作为一个 一种隔离功能子系统的方法，并作为将这些系统链接到 潜在的神经基质我们依靠两个新的程序来评估 整体加工：空间求和和分类知觉（CP）噪声。 我们将使用心理物理程序来调查的范围和范围 在识别个人身份和面部情绪方面的整体加工。我们 将研究在一系列刺激条件下的整体处理， 确定其特性，这包括变化的空间频率， 分割面部图像。我们还将确定是否全面 加工存在于高度实践的从属识别任务中。我们 还将使用fMRI描绘面部处理的功能解剖学， 依靠面部倒置效应的变体来更清楚地识别那些 大脑中参与面部特定过程的部分。我们要求 这些区域是否与假定的面部和对象区域重合。我们将 还使用事件相关的功能磁共振成像来观察检测的共同定位， 识别特定的过程与面部和对象区域。我们还将研究 人脸检测，开发整体处理的措施，从而使 识别和检测中的整体处理的比较。我们将 寻找面部检测和识别过程的分离， 面孔失认症患者和面部皮质下成分的证据 失明患者的检测。

DESCRIPTION (provided by the applicant): It has been assumed in the study of vision that there are distinct sub-systems or modules. In the field of visual object recognition this is most clearly evident in the question--Are faces special? This can be divided into two research questions. (1) Does the processing of faces operate according to the same or different computational principles as the processing of other objects? (2) are there a separate anatomical regions in the visual system for the processing of facial images, distinct from the processing of visual objects? To address these fundamental issues, we turn to visual psychophysics which has proven itself, both as a method to isolate functional subsystems and as a way to link such systems to underlying neural substrates. We rely on two new procedures to evaluate holistic processing: spatial summation and categorical perception (CP) noise. We will use psychophysical procedures to investigate the range and scope of holistic processing in the recognition personal identity and facial emotion. We will examine holistic processing under a range of stimulus conditions to better determine its characteristics, this includes varying spatial frequency and fragmenting the facial image. We will also determine whether holistic processing is present in highly practiced subordinate recognition tasks. We will also delineate the functional anatomy of face processing using fMRI and relying on variants of the face inversion effect to more clearly identify those parts of the brain that are participating in face-specific processes. We ask whether these areas will coincide with putative face and object areas. We will also use event related fMRI to see the co-localization of detection and recognition specific processes with face and object areas. We will also study face detection, developing a measure of holistic processing, thus enabling a comparison of holistic processing in both recognition and detection. WE will look for a dissociation of face detection and recognition processes in prosopagnosic patients and evidence for a subcortical component of face detection in blindsight patients.