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

波斯纳 在国家科学基金会的支持下，俄勒冈州大学将购买一个双浦肯野眼动追踪系统和相关配件。由斯坦福大学研究所和Forward Technologies开发的眼动仪可以在一个大的二维视野范围内确定眼睛注视的方向。它以红外光工作，不会干扰正常视力。 该系统精确到1弧分，每毫秒输出一个信号。这种时间和空间的准确性是必不可少的跟踪平滑追求眼球运动。 Michael Posner博士和他的同事将使用该仪器进行三方面的研究。第一项研究涉及阅读中已识别的神经区域之间的交流。 以往的研究表明，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。根据计划的研究，研究将扩展到实际的阅读情况。将监测眼球运动并记录脑电活动。第二组实验涉及注意力在语言产生中的作用。眼动追踪系统将被用来测量注意力在真实的时间分配，而受试者产生的动画事件，他们目睹的描述。最后一个研究领域涉及视觉运动域中的感知运动变换。在刺激物的视在运动与其真实的运动在速度上有很大差异的情况下，研究者希望发现眼睛实际跟踪的是哪一个过程。

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.