Acquisition of Dual Purkinje Eye Tracking System: Research in Attention, Vision and Language

在美国国家科学基金会的支持下，俄勒冈大学将购买双浦肯野眼动追踪系统和相关配件。这款眼动仪由斯坦福研究所和Forward Technologies共同开发，可以在一个大的二维视野范围内确定眼球的注视方向。它使用红外光操作，不会干扰正常视力。该系统精确到1分弧度，每毫秒输出一个信号。这种时间和空间的准确性对于追踪眼球的平滑运动至关重要。迈克尔·波斯纳博士和他的同事们将利用这台仪器进行三项研究。第一项研究涉及阅读中已识别神经区域之间的交流。先前的研究表明，特定的神经区域参与处理视觉呈现的单词的视觉、语音和语义代码。在计划的研究中，研究将扩展到实际的阅读情况。眼球运动将被监控，脑电活动将被记录。第二组实验涉及到注意力在语言产生中的作用。当受试者描述他们所看到的动画事件时，眼动追踪系统将用于实时测量注意力的分配。最后一个研究领域涉及视觉运动领域的感知-运动转换。在刺激物的表面运动速度与其实际运动速度有很大差异的情况下，研究人员希望发现眼睛实际跟踪的路线。

Posner With National Science Foundation support, the University of Oregon will purchase a Dual Purkinje Eye Tracking system and related accessories. Developed by Stanford Research Institute and Forward Technologies, the eyetracker determines the direction of eye gaze over a large two-dimensional visual field. It operates with infrared light and does not interfere with normal vision. The system is accurate to 1 minute of arc and outputs a signal every millisecond. This temporal as well as spatial accuracy are essential in tracking smooth pursuit eye movements. Dr. Michael Posner and his colleagues will use the instrument to pursue three lines of research. The first involves a study of communication between identified neural areas in reading. Previous studies have shown that specific neural areas are involved in processing visual, phonological and semantic codes of visually presented words. Under the planned research, studies will be extended to actual reading situations. Eye movement will be monitored and brain electrical activity recorded. A second set of experiments involves the role of attention in language production. The eye tracking system will be used to measure allocation of attention in real time while subjects produce descriptions of animated events they witness. A final area of research involves perceptual-motor transformations in the visual motion domain. In instances where apparent motion of a stimulus differs substantially in velocity from its real motion, the investigators wish to discover which course the eye actually tracks.