Aerosp Med Hum Perform. 2020 May 1;91(5):409-415. doi: 10.3357/AMHP.5567.2020.
Given the challenges of collecting reliable Psychomotor Vigilance Task (PVT) data in the field, this study compared a 3-min PVT on a hand-held device and wrist-worn device vs. a standardized laptop. The experiment utilized a randomized, repeated-measures design. Subjects ( = 36) performed the PVT on a touch-screen, hand-held device (HHD), a wrist-worn device (WWD), and a standardized laptop (L). Sleep was assessed using wrist-worn actigraphy. Compared to the L, the HHD was slower on average (∼50% longer reaction times; ∼34% slower response speeds; ∼600% more lapses in attention combined with false starts) and introduced a proportional bias that decreased the range of response speeds by 60%. Compared to the L, the WWD with the backlight on was faster on average (reaction time: ∼6%; response speed: ∼13%), but equivalent in lapses combined with false starts, and introduced a proportional bias that increased the range of responses by 60%. Compared to the L PVT, using a hand-held, touch screen interface to collect PVT data may introduce a large constant bias and a proportional bias that decreases the range of response speed. However, performance on the WWD closely mirrors performance on the L PVT and the proportional bias tends to be in favor of detecting individuals with slower responses. Researchers should avoid comparing PVT metrics between different device types. Reliability of PVT data from a WWD or HHD may be degraded when used in an operational setting with unpredictable environmental movement (such as a surface maritime setting).
鉴于在现场收集可靠的精神运动警觉任务（PVT）数据的挑战，本研究比较了手持设备和腕戴设备上的 3 分钟 PVT 与标准化笔记本电脑的对比。该实验采用随机重复测量设计。受试者（n=36）在手触屏手持设备（HHD）、腕戴设备（WWD）和标准化笔记本电脑（L）上完成 PVT。使用腕戴活动记录仪评估睡眠。与 L 相比，HHD 的平均速度较慢（反应时间长约 50%；响应速度慢约 34%；注意力不集中和假启动的失误次数多约 600%），并引入了一个比例偏差，使响应速度范围缩小了 60%。与 L 相比，WWD 的背光灯开启时的平均速度较快（反应时间快约 6%；响应速度快约 13%），但在失误和假启动方面相同，并且引入了一个比例偏差，使响应范围扩大了 60%。与 L PVT 相比，使用手持触屏界面收集 PVT 数据可能会引入较大的恒定偏差和比例偏差，从而缩小响应速度范围。然而，WWD 的性能与 L PVT 的性能非常相似，比例偏差往往有利于检测反应较慢的个体。研究人员应避免在不同设备类型之间比较 PVT 指标。在具有不可预测环境运动（如水面航海环境）的操作环境中，WWD 或 HHD 的 PVT 数据可靠性可能会降低。
