Insomnia Test (ISI)
How severely insomnia has affected your sleep over the past 2 weeks
Struggling with sleep? The Insomnia Severity Index (ISI) assesses sleep onset, maintenance, and early morning awakening problems over the past 2 weeks. 7 items, about 3-5 minutes.
What Is the Insomnia Severity Index (ISI)?
The ISI measures a patient's perception of insomnia severity. Bastien, Vallières & Morin developed it in 2001. It is one of the more commonly used insomnia assessments out there.
Scale Structure
The ISI contains 7 items covering the core dimensions of insomnia:
- Sleep difficulty severity (Q1-Q3): difficulty falling asleep, staying asleep, early morning awakening
- Sleep satisfaction (Q4): subjective satisfaction with current sleep pattern
- Daytime functioning impact (Q5): interference with daily functioning
- Noticeability (Q6): how noticeable the impairment is to others
- Distress (Q7): level of worry/distress about the sleep problem
Scoring
Each item rated 0-4, total score 0-28. Higher scores indicate more severe insomnia.
Clinical Cutoffs
- 0-7: No clinically significant insomnia
- 8-14: Mild to moderate insomnia symptoms
- 15-21: Moderate insomnia (warrants evaluation and treatment)
- 22-28: Severe insomnia (immediate professional help recommended)
Psychometric Properties
Validation data (Bastien et al., 2001):
- Internal consistency: α = 0.90-0.91
- Test-retest reliability: r = 0.83
- Good convergent validity with sleep diary measures
- Good sensitivity and specificity at various cutoffs
Reference
Bastien, C. H., Vallières, A., & Morin, C. M. (2001). Validation of the Insomnia Severity Index as an outcome measure for insomnia research. *Sleep Medicine*, 2(4), 297-307.
Morin, C. M. (1993). *Insomnia: Psychological Assessment and Management*. New York: Guilford Press.
Scoring Guide
Sum all 7 items (each rated 0-4) for a total score of 0-28. 0-7 = no clinically significant insomnia; 8-14 = mild/moderate insomnia symptoms; 15-21 = moderate insomnia; 22-28 = severe insomnia. Note: Q4 (satisfaction) is reverse-keyed in concept but scored consistently (0=very satisfied, 4=very dissatisfied) and summed directly.Result Interpretation
After completing the 7 questions, you'll receive an immediate, detailed report with:
- Your score — calculated automatically based on your responses
- Score interpretation — what your score means in practical terms
- Context — how your results compare to general population norms where available
All results are displayed on screen. No account or login needed.
Deep Report
One-time unlock · $3
Unlock the full deep report with personalized, in-depth interpretation:
- Item-by-item analysis — what each of your answers means
- Pattern combination analysis — how symptoms cluster together
- Personalized advice — practical next steps for your score
- Full score interpretation — the complete meaning of your result
Complete the test to see a preview — unlock the full deep report after viewing your free results.