Finocchio D V, Preston K L, Fuchs A F
Department of Psychology, University of Washington, Seattle 98195.
Vision Res. 1990;30(8):1119-28. doi: 10.1016/0042-6989(90)90169-l.
We have developed a calibration procedure that combines the measurement of the EOG voltage with the concurrent assessment of the actual direction of gaze as revealed by the corneal reflection of a target light. Using this method, we have been able to calibrate the eye-position signal recorded from 2- and 3-month-old infants. Our results show that in young infants (1) the EOG is linearly related to eye position to at least +/- 20 deg; (2) the slopes of the calibration lines measured early and late in the same test session were not significantly different at the 0.1 level; (3) at the most eccentric eye position, the calibration was accurate to within +/- 1 deg; and (4) an abbreviated calibration at 0 and +/- 15 deg, which took less than 2 min, produced essentially the same slope (t-test not significant at the 0.1 level) as a longer procedure that tested at every 5 deg between +20 and -20 deg.
我们开发了一种校准程序，该程序将眼电图（EOG）电压的测量与通过目标光的角膜反射所揭示的实际注视方向的同步评估相结合。使用这种方法，我们已经能够校准从2至3个月大婴儿记录的眼位信号。我们的结果表明，在幼儿中：（1）眼电图与眼位呈线性关系，至少在±20度范围内；（2）在同一测试时段早期和晚期测量的校准线斜率在0.1水平上无显著差异；（3）在最偏心的眼位处，校准精确到±1度以内；（4）在0度和±15度处进行的简短校准（耗时不到2分钟）产生的斜率与在+20度至 -20度之间每隔5度进行测试的较长程序基本相同（t检验在0.1水平上不显著）。
