About the Perceived Stress Scale
The PSS-10 was developed by Sheldon Cohen, Tom Kamarck, and Robin Mermelstein (1983) and is the most widely used psychological instrument for measuring perceived stress. It asks about feelings and thoughts during the past month. The scale is non-specific — it measures the degree to which life situations are appraised as stressful, rather than asking about specific stressors.
4 items are reversed (items 4, 5, 7, 8): for these, the score is 4 minus the response. This controls for acquiescence bias. Average scores in population samples are typically 13-18. Scores above 20 are considered clinically significant in research contexts.
PSS-10 scoring method
| Response | Forward items (1,2,3,6,9,10) | Reversed items (4,5,7,8) |
|---|---|---|
| Never | 0 | 4 |
| Almost never | 1 | 3 |
| Sometimes | 2 | 2 |
| Fairly often | 3 | 1 |
| Very often | 4 | 0 |
Evidence-based stress management
The interventions with strongest evidence for reducing perceived stress are: Mindfulness-Based Stress Reduction (MBSR) — 8-week programme with consistent effect sizes around 0.5-0.8; regular aerobic exercise (150+ minutes/week) — reduces cortisol and improves HPA axis regulation; CBT addressing cognitive appraisal of stressors; adequate sleep (7-9 hours); and social support. The PSS-10 is responsive to intervention and useful for tracking change over time.
Related tools
For depression screening (often associated with high stress), see PHQ-9 Depression Scale. For anxiety, see GAD-7 Anxiety Scale. For occupational burnout, see Burnout Index. For sleep quality (disrupted by stress), see Sleep Quality Score.
References
- Cohen S, Kamarck T, Mermelstein R. "A global measure of perceived stress." J Health Soc Behav. 1983;24(4):385-396.
- Cohen S, Williamson GM. "Perceived stress in a probability sample of the United States." In Spacapan S, Oskamp S (eds). The Social Psychology of Health. Sage; 1988:31-67.