Agreement between the 3-minute Psychomotor Vigilance Task (PVT) Embedded in a Wrist-worn Device and the Laptop based PVT

摘要

The study assesses the agreement between the 3-minute version of the PsychomotorVigilance Task (PVT) with an interstimulus interval (ISI) of 2 to 10 seconds and thevalidated 3-minute laptop-based PVT (ISI=1-4 seconds). The experiment utilized arandomized, within-subject, repeated-measures design with three factors (PVT devicetype, the backlight feature of the wrist-worn device, ambient lighting). Results show thedifferences in reaction times (RT) between devices are incrementally associated with themagnitude of the RTs. These differences tend to be in opposing directions when thebacklight feature in the wrist-worn device is on. That is, RTs in the wrist-worn devicetend to be faster compared to the laptop for (on average) faster individuals, whereas (onaverage) slower individuals tend to do better in the laptop compared to the wrist-worndevice. The proportional bias introduced by the wrist-worn device compared to the laptopmakes it difficult to translate individual RTs between different devices. The proportionalbias, however, may work in favor for detecting differences between slow and fast RTs.