照準作業能に対する間欠的視覚情報遮断の影響

概要

論文の詳細を見る
The influence of intermittent interception of visual information during the task of target aiming was observed on eight healthy adults. The target aiming task was performed on the apparatus used to measure the function of concentration maintenance. The target aiming task was practiced for one minute before the beginning of the experiment in order to remove the low performance level of the function at the beginning of the task. The experimental period was then divided into three segments, that is, the pre-experimental phase, the experimental phase or the intermittently intercepted phase and the post-experimental phase. The pre and post phases were of sixty seconds duration and visual information was received with no interruption. During the experimental phase the visual information was interrupted periodically by an automatic shutter which was fitted to the front of the telescope. The duration of interception of visual information was called "OFF-time". The duration of visual information was called "ON-time". OFF-time was varied with ON-time held constant and then ON-time was varied with the other variable held constant. The duration of experimental phase, therefore, was varied from 51.0 to 64.5 seconds. The mean of the task performance (L) and the reliability of control of task (D/L) for each experimental condition was measured from the work curve. The results are as follows. 1) The difference in performance level between pre and post and the experimental phase was plotted. It was observed that with ON-time held constant, the performance level of the intermittently intercepted phase decreased as the OFF-time became increased. When the OFF-time became shorter the difference between the pre and experimental phase compared to the post and experimental phase was insignificant. In spite of the insignificant difference of performance level between the experimental and the pre phase, it was always observed that the difference of the performance level between the experimental and the post phase was significant. 2) When the ON- and OFF-time were varied at the same time it was noted that under certain conditions, the performance levels of the pre and experimental phases were the same, but the performance level of the post experimental phase was significantly different. The ON-OFF times were seen to be as follows. A) ON 7 seconds OFF 3 seconds B) ON 3 seconds OFF 2 seconds C) ON 1 second OFF 1 second These conditions are termed the Critical Conditions. 3) The critical condition was dependent not only on the total duration or ratio of OFF-time but also on the combination of ON-OFF time. 4) The factor analysis was conducted for performance level in the critical condition, time of duration of task under the continuous interception of visual information, and time required for reversion to the performance level in the pre phase at the re-insertion of visual information. It was suggested that even in the critical condition, there was difference in meaning between the condition of OFF 3 seconds and that of OFF 2 or 1 second. 5) The systematic influence of the experimental phase on the difference of task performance level between the pre and post experimental phase was not observed. 6) The influence of the experimental phase on the relative reliability of feedback control was also not systematic.
社団法人日本産業衛生学会の論文
1971-04-20

著者

重永博
三重県立大学医学部衛生学教室

照準作業能に対する間欠的視覚情報遮断の影響

スポンサーリンク

概要

著者

関連論文

スポンサーリンク