School of Kinesiology, Faculty of Health Sciences, Western University, London, Ontario, Canada.
Behav Res Methods. 2019 Oct;51(5):2302-2309. doi: 10.3758/s13428-019-01197-2.
Laboratory-based retroreflective and magnetic scleral search-coil technologies are the current standards for collecting saccadometric data, but such equipment is costly and cumbersome. We have validated a novel, portable, high-speed video camera-based system (Exilim EX-FH20, Casio, Tokyo, Japan) for measuring saccade reaction time (RT) and error rate in a well-lit environment. This system would enable measurements of pro- and antisaccades in athletes, which is important because antisaccade metrics provide a valid tool for concussion diagnosis and determining an athlete's safe return to play. A total of 529 trials collected from 15 participants were used to compare saccade RT and error rate measurements of the high-speed camera system to a retroreflective video-based eye tracker (Eye-Trac 6: Applied Sciences Laboratories, Bedford, MA). Bland-Altman analysis revealed that the RT measurements made by the high-speed video system were 11 ms slower than those made by the retroreflective system. Error rate measurements were identical between the two systems. An excellent degree of reliability was found between the system measurements and in the ratings of independent researchers examining the video data. A strong association (r = .97) between the RTs determined via the retroreflective and high-speed camera systems was observed across all trials. Our high-speed camera system is portable and easily set up, does not require extensive equipment calibration, and can be used in a well-lit environment. Accordingly, the camera-based capture of saccadometric data may provide a valuable tool for neurological assessment following a concussive event and for the continued monitoring of recovery.
基于实验室的反光和磁性巩膜搜索线圈技术是目前收集眼跳测量数据的标准，但这种设备既昂贵又笨重。我们已经验证了一种新型的、便携式的高速摄像机制（Exilim EX-FH20，卡西欧，东京，日本），用于测量在光照环境下的眼跳反应时间（RT）和错误率。该系统将能够测量运动员的正眼跳和反眼跳，这很重要，因为反眼跳指标提供了一种有效的脑震荡诊断工具，并确定运动员是否可以安全回归运动。该系统共采集了 15 名参与者的 529 次试验，用于比较高速摄像机制和反光视频眼动追踪器（Eye-Trac 6：应用科学实验室，贝德福德，MA）的眼跳 RT 和错误率测量值。Bland-Altman 分析显示，高速摄像机制的 RT 测量值比反光系统慢 11 毫秒。两个系统的错误率测量值相同。研究人员发现，系统测量值和独立检查视频数据的研究人员的评分之间具有极好的可靠性。在所有试验中，通过反光和高速摄像系统确定的 RT 之间存在很强的相关性（r =.97）。我们的高速摄像系统便携易用，不需要进行大量的设备校准，并且可以在光照良好的环境中使用。因此，基于摄像机制的眼跳测量数据的采集可能为脑震荡后神经评估以及康复监测提供有价值的工具。
