The Dysfunctional Beliefs and Attitudes About Sleep Scale (DBAS)

What is the DBAS?

The DBAS is a short, self-report questionnaire a person fills out about their own attitudes toward sleep. Each statement describes a belief — about how much sleep is needed, what happens after a poor night, or how little control the sleeper feels they have — and the person rates how strongly they agree. The most-used version has sixteen items; higher agreement means more unhelpful beliefs.

The scale was developed by the insomnia researcher Charles Morin, first as a longer questionnaire and later shortened to the sixteen-item DBAS-16 that most clinics and studies now use. It is meant to be filled out about your general outlook on sleep, not about any single night. Because the instrument is copyrighted, this page describes what it measures rather than reproducing its statements.

Why do beliefs about sleep matter?

Insomnia is trouble falling or staying asleep despite having the chance to sleep, and when it lasts three nights a week for more than three months it is considered chronic 1Ref 1National Heart, Lung, and Blood Institute (2022).Insomnia — What Is Insomnia?.Definition of insomnia and the three-nights-a-week, more-than-three-months threshold for chronic insomnia; that CBT-I is a recommended treatment.. What turns a rough patch into that chronic loop is often not the original stressor but the worry stacked on top of it: the more a person frets about not sleeping, the more wired they become at bedtime, and the harder sleep gets.

This is where beliefs do their damage. A conviction that you must get eight hours or the day is ruined — a version of the eight-hour myth — turns an ordinary 3am waking into a small emergency, and the alarm that follows is the opposite of what sleep needs. The DBAS was built to make those convictions visible and measurable, because a belief you can see is a belief you can work on.

The beliefs are not what started the insomnia, but they are often what keeps it running.

What kinds of beliefs does it look at?

The DBAS-16 sorts its statements into four themes: the feared consequences of poor sleep, worry and helplessness about sleep, expectations about how much sleep is 'normal,' and beliefs about sleeping medication. Grouping them this way lets a clinician see not just that someone sleeps badly, but which stories are driving the distress — a person terrified of daytime collapse needs a different conversation than one who feels a pill is the only answer.

That last theme matters, because the belief that one cannot sleep without medication is itself treatable. In a trial of older adults with chronic insomnia, cognitive behavioral therapy outperformed the sleeping pill zopiclone and kept working at six months, while the drug proved no better than placebo over the long run 2Ref 2Sivertsen B, Omvik S, Pallesen S, et al. (2006).Cognitive Behavioral Therapy vs Zopiclone for Treatment of Chronic Primary Insomnia in Older Adults: A Randomized Controlled Trial.That CBT-I outperformed the sleeping pill zopiclone and produced more durable results in older adults, while the drug was no better than placebo long-term.. The evidence, in other words, argues against the very belief the DBAS is measuring.

How is the score used?

Scores are averaged so that a higher number means stronger endorsement of unhelpful beliefs. There is no official cutoff that says 'you have insomnia' — the DBAS is not a diagnostic test. It is a therapy and research tool, used to pinpoint which beliefs to target and to track whether they soften over treatment. For a read on how severe the insomnia itself is, clinicians reach for a different questionnaire.

That other questionnaire is usually the insomnia severity index, a validated self-report measure of how bad the insomnia is right now 3Ref 3Bastien CH, Vallieres A, Morin CM (2001).Validation of the Insomnia Severity Index as an outcome measure for insomnia research.That the Insomnia Severity Index is a validated self-report measure of insomnia severity, distinct from a measure of sleep beliefs.. The two answer different questions: the ISI asks how severe your sleep problem is, while the DBAS asks what you believe about it. A person can score high on both, and tracking them together shows whether changing the beliefs is loosening the insomnia itself.

Does everyone with insomnia hold these beliefs?

Not to the same degree. Some people's insomnia is driven mostly by the cognitive side — racing worry about sleep and rigid rules about it — while others are driven more by behavior, like an erratic schedule, or by a physical condition that fragments the night. The DBAS exists precisely to tell those apart. A person who scores high on beliefs but sleeps on a steady schedule is pointed toward the thinking work; someone whose beliefs are mild may need the behavioral pieces more.

This is why a good insomnia assessment rarely rests on one questionnaire. The beliefs measure sits alongside a severity measure, a sleep history, and often a sleep diary, and together they sketch what is actually keeping a particular person awake. The DBAS contributes one piece of that picture: the cognitive one.

What actually changes these beliefs?

The beliefs the DBAS measures are the direct target of cognitive restructuring, the thinking half of cognitive behavioral therapy for insomnia. A therapist helps a person test a belief against their own experience — has a single bad night really ruined every day after it? — and replace the catastrophic version with something truer and calmer. This is how CBT-I works on dysfunctional beliefs about sleep head-on rather than around them. Behavioral pieces like sleep restriction therapy and stimulus control work alongside it, and generic advice runs into its own sleep hygiene limits when the beliefs are the real driver.

Across twenty randomized trials, the full CBT-I package produced meaningful gains in how fast people fell asleep and how long they stayed asleep, with effects that lasted 4Ref 4Trauer JM, Qian MY, Doyle JS, Rajaratnam SMW, Cunnington D (2015).Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-analysis.That CBT-I produces clinically meaningful, durable improvements in sleep-onset latency, wake after sleep onset, and sleep efficiency across twenty randomized trials.. It also works when delivered through an app or website rather than a therapist's office, which has made it far easier to reach 5Ref 5Espie CA, Emsley R, Kyle SD, et al. (2019).Effect of Digital Cognitive Behavioral Therapy for Insomnia on Health, Psychological Well-being, and Sleep-Related Quality of Life: A Randomized Clinical Trial.That digital CBT-I delivered without a therapist improves sleep and daytime well-being in a large randomized trial.. If the beliefs and the sleeplessness have both settled in, finding a CBT-I provider is the step that addresses both.

Should I take the DBAS on my own?

You can find the DBAS in the appendices of published papers and in some clinician workbooks, and filling it out can be a useful mirror — it names beliefs you might not have noticed you held. But a high score is not a diagnosis, and it is not something to grade yourself against in isolation. Its real value shows up alongside a clinician, where the answers become the agenda for treatment rather than another thing to worry about.

If you want a validated questionnaire designed for self-completion and for tracking your own sleep over time, the sleep condition indicator was built for that purpose; the DBAS was built for the therapy room. Either way, the point is the same: a score is a conversation-starter, not a verdict.

A high score describes beliefs, not a broken brain — and beliefs are among the most changeable things in insomnia.