Lundberg U, Melin B, Evans G W, Holmberg L
Psychology Division, Karolinska Instutet, Stockholm, Sweden.
Ergonomics. 1993 Jun;36(6):601-11. doi: 10.1080/00140139308967923.
Two contrasting 90 min VDT work situations were simulated in the laboratory: (1) a machine-paced, repetitive data entry task; and (2) a stimulating, self-paced learning task with successive feedback. Thirty non-smoking male students (20-34 years), without previous experience of VDT work, participated individually in each condition on two consecutive days (balanced order) and in a task-free baseline condition. Self-reports and successive measurements (ambulatory recordings) of systolic and diastolic blood pressure and heart rate were obtained during work and during a subsequent 60 min period of deactivation. Urine samples were obtained after each period for the determination of catecholamines and cortisol. In the baseline condition, measurements were obtained at corresponding times of the day. As expected, the data entry task was associated with self-reports of boredom, irritation, and unpleasantness; the learning task wtih alertness, interest, and ability to concentrate. Similar elevations of physiological measurements occurred in both work situations. However, differences between conditions were found after work. Following data entry, deactivation was slower in five of the six variables (significant for epinephrine).
在实验室中模拟了两种截然不同的90分钟VDT工作情境：（1）机器节奏的重复性数据录入任务；（2）有连续反馈的刺激性、自主节奏的学习任务。30名不吸烟的男性学生（20 - 34岁），此前无VDT工作经验，在两种情境下各连续两天（顺序平衡）单独参与实验，并处于无任务的基线状态。在工作期间以及随后60分钟的休息期，获取自我报告以及收缩压、舒张压和心率的连续测量值（动态记录）。每个时间段后采集尿液样本以测定儿茶酚胺和皮质醇。在基线状态下，在一天中的相应时间进行测量。正如预期的那样，数据录入任务与无聊、烦躁和不愉快的自我报告相关；学习任务与警觉、兴趣和集中注意力的能力相关。两种工作情境下生理测量值均有类似升高。然而，工作后发现不同情境之间存在差异。数据录入后，六个变量中的五个在休息期恢复较慢（肾上腺素显著）。
