Pittsburgh Sleep Quality Index (PSQI)
Sleep quality assessment for the past month
Not sleeping well? The PSQI looks at your sleep quality over the past month. 14 self-report questions covering 7 areas: sleep quality, how long it takes to fall asleep, sleep duration, efficiency, disruptions, medication use, and daytime functioning. Takes 5-10 minutes.
Is your sleep really refreshing?
Sleep problems are incredibly common — but not all sleep issues are the same. Some people struggle to fall asleep, others wake up too early, and many simply don't feel rested despite getting enough hours.
The Pittsburgh Sleep Quality Index (PSQI) assesses sleep quality over the past month across seven areas: subjective sleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbances, use of sleep medication, and daytime dysfunction.
What the scores mean
- 0–5: Good sleep quality
- 6–10: Poor sleep quality
- 11–21: Very poor sleep quality
About this scale
Daniel Buysse and colleagues developed the PSQI in 1989. It's now a widely used self-report measure of sleep quality in research and clinical practice.
- Internal consistency: α = 0.83
- Test-retest reliability: r = 0.85
- Completion time: 5–10 minutes
Result Interpretation
After completing the 18 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.