Challenge catastrophic thoughts about sleep

Identify and test the beliefs that turn a bad night into a disaster story.

Why it works

Insomnia is perpetuated partly by dysfunctional beliefs about sleep — "I must get 8 hours or tomorrow is ruined," "I have no control over my sleep." These beliefs increase pre-sleep arousal and raise the stakes of wakefulness, which in turn increases cortisol and makes sleep harder. Challenging them reduces the threat value of poor sleep and breaks the anxiety loop.

How to do it

1. Write down the thought that keeps you awake ("If I sleep less than 6 hours I cannot function").
2. Look for evidence for and against it — have you actually failed completely after short sleep?
3. Generate a realistic alternative: "I may feel rough but I have coped before and will manage."

Evidence

Cognitive restructuring as part of CBT-I is supported by RCTs of the combined package; the DBAS (Dysfunctional Beliefs and Attitudes about Sleep) scale shows these beliefs correlate with insomnia severity and improve with successful treatment. (rct)

It is difficult to isolate the contribution of cognitive restructuring versus behavioral components; effects of combined CBT-I are well supported, individual components less so.

Sources

• Morin et al. (2007), DBAS-16 and insomnia, SLEEP

Common mistake

Arguing with the thought to "win" it rather than to test it — the goal is to loosen grip on it, not to suppress it through willpower.