The 3-minute Psychomotor Vigilance Task (PVT) Embedded in a Wrist-worn Device: Time of Day Effects

Abstract

The study assesses the utility of the 3-minute version of the Psychomotor Vigilance Task (PVT) embedded in a wrist-worn device (interstimulus interval – ISI =1 - 4 seconds) to detect changes in performance between a morning and an afternoon data collection session. The experiment utilized a randomized, within-subject, repeated-measures design with two factors, device type (wrist-worn PVT, laptop PVT, Go/No-Go task) and time of day (morning, afternoon). Results showed that performance in both the wrist-worn 3-minute PVT (ISI = 1 – 4 seconds) and the 5-minute Go/No-Go task (180 trials, 80% Go/20% No Go; ISI = 0.5 – 1.0 seconds) differed between the morning and the afternoon sessions but not the laptop-based PVT. We discuss these findings under the light of the differences in task characteristics between the wrist-worn and the laptop PVT

The Efficacy of a Multimodal Bedroom-Based ‘Smart’ Alarm System on Mitigating the Effects of Sleep Inertia

“…Performance was measured using the Psychomotor Vigilance Task (PVT), a simple and brief vigilance task that has proven effective for examining circadian and homeostatic effects in sustained attention [ 59 , 60 , 61 ]. Participants were instructed to touch the screen as soon as they saw a circle appear on it, which occurred at random time intervals between 1 and 4 s. The current study used a 3 min variate of the task, which has been shown to be similarly effective for the traditional longer version of the task [ 62 , 63 , 64 , 65 ]. After each PVT test, participants answered questions regarding their current feelings of affect/mood from the Positive Affect Negative Affect Schedule (PANAS) [ 66 ] and alertness from the Stanford Sleepiness Scale (SSS) [ 67 ].…”

“…For PVT output measures, we assessed the mean reaction time, mean response speed (reciprocal reaction time calculated as 1/RT*1000), the number of false starts (error of commission where the participant makes a response < 100 ms), and two kinds of errors of omission (percentage of 355 ms and 500 ms lapses, [ 64 ]). For PVT metrics, we removed any outliers that were more than 2 standard deviations from the mean.…”

Assessment of the fixed 4-hours on/8-hours off watchstanding schedule on a surface vessel of the Swedish Royal Navy

“…Volunteers signed informed consent forms and received training prior to being issued their actiwatches and activity logbooks. All participants were instructed to fill out their activity logbooks daily and perform the PVT using their actiwatch prior to and after their watchstanding period Matsangas, Shattuck, & Brown, 2017;Matsangas, Shattuck, Mortimore, Paghasian, & Greene, 2019). The Pittsburgh Sleep Quality Index PSQI was used to determine sleep quality (Buysse, Reynolds, Monk, Berman, & Kupfer, 1989).…”