The Multiple Sleep Latency Test

The Multiple Sleep Latency Test (MSLT) is a test to objectively evaluate a person’s level of daytime sleepiness.  The MSLT includes the repeated measurement of sleep latency (how quickly someone can fall asleep) across the span of a day.  This is done via a series of usually 4 (four), but sometimes 5 (five), “nap tests” performed at regular timed intervals throughout the day.

The Maintenance of Wakefulness Test

The Maintenance of Wakefulness Test (MWT) is a test to objectively evaluate a person’s ability to remain awake during the day in non-active situations.  The MWT includes a series of 4 (four) “trials” performed at regular timed intervals throughout the day.  During each trial, you will be asked to sit on a chair in a dimly lit room and try to remain awake for 40 minutes.