Sleep onset latency
| Minutes | Sleepiness | |||
|---|---|---|---|---|
| 0–5 | Severe | |||
| 5–10 | Troublesome | |||
| 10–15 | Manageable | |||
| 15–20 | Excellent | |||
| A sleep onset latency of 0 to 5 minutes means severe sleep deprivation, 5 to 10 minutes is "troublesome", 10 to 15 minutes indicates a mild but "manageable" degree of sleep debt, and 15 to 20 minutes is indicative of "little or no" sleep debt.: 341–342 | ||||
In sleep science, sleep onset latency (SOL) is the length of time that it takes to accomplish the transition from full wakefulness to sleep, normally to the lightest of the non-REM sleep stages.