The Maintenance of Wakefulness Test (MWT) is used to assess your level of daytime sleepiness. Although this is not a diagnostic tool, it does provide insight to the severity of the daytime sleepiness, and can be used to help assess the effectiveness of treatments you may be receiving for sleep problems.
The study begins two hours after awakening and consists of five tests occurring at two-hour intervals. For each test, you will sit upright in a recliner or against the headboard of a bed. The lights are turned out and you are instructed to remain awake, but not move. The test will last a maximum of 30 minutes. Several parameters are measured continuously during the wakefulness period.