PVT Lapses
Cognitive Tests number
Number of lapses (RT > 500 ms) in PVT — marker of inattention.
Detailed Description
A lapse is a response > 500 ms, indicating a brief attention failure. The most sensitive PVT metric for sleep deprivation. 0–2 lapses = good. > 5 = significant vigilance decline. Grows exponentially with chronic sleep restriction (Van Dongen 2003).
How to Improve
- Each additional hour of sleep reduces lapses
- Do not drive with > 5 lapses