Applying the quarter-hour rule: can people with insomnia accurately estimate 15-min periods during the sleep-onset phase?
The 'quarter-hour rule' (QHR) instructs the person with insomnia to get out of bed after 15 min of wakefulness and return to bed only when sleep feels imminent. Recent research has identified that sleep can be significantly improved using this simple intervention (Malaffo and Espie, Sleep, 27(s), 2004, 280; Sleep, 29 (s), 2006, 257), but successful implementation depends on estimating time without clock monitoring, and the insomnia literature indicates poor time perception is a maintaining fa...Expand abstract
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