Free test · 2 minutes
ISI test: how severe is your insomnia?
The Insomnia Severity Index measures, in 7 questions, how much your nights weigh on your days. Your score appears straight away.
- 7 questions
- Instant result
- No account
Question 1 of 7
Think about the last two weeks.
Difficulty falling asleep
What the test measures
Your nights
Falling asleep, staying asleep, waking up too early.
Your days
How those nights affect your energy, your mood and your daily life.
How you feel about it
How satisfied you are and how much your sleep worries you.
How to read your score
Each answer is worth 0 to 4 points. The total ranges from 0 to 28.
| 0 to 7 | No clinically significant insomnia |
|---|---|
| 8 to 14 | Subthreshold insomnia |
| 15 to 21 | Clinical insomnia (moderate severity) |
| 22 to 28 | Clinical insomnia (severe) |
A guide, not a diagnosis
This questionnaire helps you take stock; it does not replace a consultation. If your sleep worries you, or if you feel sleepy at the wheel, talk to your doctor.
In an emergency, call 112 or your local emergency number.
Frequently asked questions
What is the ISI test?
The Insomnia Severity Index (ISI) is a 7-question questionnaire published by Charles M. Morin and his team. It is used in clinical practice and research to measure how severe insomnia is and track how it changes.
Does the test give a diagnosis?
No. It gives you a guide to the last two weeks. Only a healthcare professional can make a diagnosis.
Do I need an account to see my score?
No, your score appears straight away. The free account lets you keep your scores, track how they change and share them with your clinician if you wish.
How often should I take the test?
The test covers the last two weeks: taking it about every two weeks lets you track how things change, for example during a CBT-I programme.
Sources
- Bastien CH, Vallières A, Morin CM. Validation of the Insomnia Severity Index as an outcome measure for insomnia research. Sleep Med 2001;2(4):297-307. doi:10.1016/S1389-9457(00)00065-4
- Morin CM, Belleville G, Bélanger L, Ivers H. The Insomnia Severity Index: psychometric indicators to detect insomnia cases and evaluate treatment response. Sleep 2011;34(5):601-608. doi:10.1093/sleep/34.5.601
Insomnia Severity Index (ISI) © Charles M. Morin. All rights reserved by the author. Questions shown one at a time for reading online.
Making sense of your resultDo I have insomnia? The signs to look out forThe difference between a run of bad nights and chronic insomnia, and when to see a doctor.Understand the methodCBT-I, the therapy for insomnia, explained simplyThis test is used to track progress during CBT-I: here is how the method works.Your score is a starting point.
ReSomnia helps you follow it and move forward, one night at a time.
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