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Random assignment to experimental and control groups controls for research reactivity.
Sleep Stage
Describes the differing phases of sleep an individual transitions through, including REM (rapid eye movement) and various levels of non-REM sleep.
Total Sleep Time
The total amount of time spent sleeping during a typical sleep period, often measured in hours.
Sleep Patterns
The natural or habitual timing, duration, and quality of sleep, including cycles of REM and non-REM sleep.
Slow-wave Sleep
A deep phase of sleep known for its slow brain waves, considered critical for restorative sleep and memory consolidation.