The Evaluation of Tracking Ability by the Body Tracking Test (BTT)
The Evaluation of Tracking Ability by the Body Tracking Test (BTT)
复制标题
通过身体跟踪测试（BTT）评估跟踪能力
DOI：
10.3757/jser.56.39
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发表时间：
1997
影响因子：
--
通讯作者：
Masahiko Yamamoto
中科院分区：
文献类型：
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作者：
Tomoe Yoshida;M. Oda;H. Osafune;M. Miyaji;Masahiko Yamamoto
为了评估动态姿势控制，开发了身体跟踪测试(BTT)。本研究以正常人为被试，要求站在稳定器上的受试者通过改变身体位置来跟踪屏幕上显示的运动光学目标。他/她的身体运动的稳定数据被记录下来并进行计算机分析。在14英寸彩色显示器上，目标的水平和垂直跨度为15厘米。光学目标以水平或垂直的方式移动。光学靶标的运动由受控三角波控制，光速为0.125赫兹。采样时间为50毫秒，总计60秒。在BTT中，目标和跟踪的增益为2.0。测试对象是健康的青年志愿者。年龄21~37岁。共有87名受试者接受测试(男49人，女38人)。平均年龄27.6岁。身体运动的总距离根据体重进行调整。身体运动总距离除以总目标运动被称为BTT运动指数，BTT运动指数平均为1.40±0.3，但BTT运动指数不适合用于跟踪评估。我们能够从数据中提取分类，称为跟踪能力评估的5个等级。A~E级定义为A级30%，B级43.7%，C级21.3%，D级5%，E级0%。这是一种主观方法，但适用于评估BTT。
To evaluate dynamic postural control, the Body Tracking Test (BTT) was developed. This paper evaluated tracking ability in normal subjects.In this test, the subject standing on the stabilometer was asked to track a moving optical target displayed on the screen by changing his/her bodily position. Stabilometric data of his/her body movement was recorded and computer-analyzed.The horizontal and vertical span of the target was 15 cm on a 14-inch color display monitor. The optical target moved in a horizontal or vertical manner. The movement of the optical target was programmed by controlled triangular waves and the optical speed was 0.125 Hz. The sampling time was 50 mseconds for a total of 60 seconds. In BTT, the gain for target and tracking was 2.0.Healthy young adult volunteers were tested. The age range was 21 to 37 years. There were 87 subjects tested (Male 49, Female 38). The mean age was 27.6. Total distance of bodily movements was adjusted by body weight. The ratio of the total distance of bodily movements divided by total target movement was called "Index of BTT movement".The index of BTT movement was 1.40±0.3 on the average, but the index of BTT movement was not appropriate for evaluating tracking.We were able to extract classifications from the data, which were called "5 grades of evaluating tracking ability". Grades A to E were defined as 30% Grade A, 43.7% Grade B, 21.3% Grade C, 5% Grade D, and 0% Grade E.This evaluation was subjective method, but appropriate for evaluating BTT.