Validation of a portable, touch-screen psychomotor vigilance test

Area of Science:

• Neuroscience
• Sleep Science
• Human Performance

Background:

• The Psychomotor Vigilance Test (PVT) is crucial for assessing vigilance deficits caused by sleep loss and circadian rhythm disruption.
• A 5-minute PVT on a personal digital assistant (PDA) was developed for field use, necessitating validation against the standard 10-minute laptop version.

Purpose of the Study:

• To validate a 5-minute PDA-based Psychomotor Vigilance Test (PVT) against a standard 10-minute laptop PVT.
• To assess the performance of both PVT versions during 38 hours of total sleep deprivation (TSD).

Main Methods:

• Participants underwent 38 hours of total sleep deprivation (TSD) in a laboratory setting.
• The Psychomotor Vigilance Test (PVT) was administered hourly, alternating between a 10-minute laptop version and a 5-minute PDA version.
• Performance was evaluated based on the number of lapses (reaction time > 500 ms) and false starts.

Main Results:

• Both PVT versions detected significant increases in lapses over time during TSD, influenced by circadian rhythms.
• The 10-minute laptop PVT showed a large effect size for lapses (f2 = 0.36), while the 5-minute PDA PVT demonstrated a medium effect size (f2 = 0.17).
• The laptop PVT identified significant false starts, whereas the PDA PVT exhibited false starts throughout the TSD period.

Conclusions:

• The 5-minute PDA PVT offers comparable functionality and results to the 10-minute laptop PVT for assessing fatigue.
• The PDA PVT effectively tracks fatigue-related performance decrements, supporting its use in field environments despite smaller effect sizes.