Perceived Stress Scale (PSS-10)
See what the scale measures, how it is scored, and how a result is read against the population that actually fits you.
The Perceived Stress Scale, in its recommended 10-item form, is the most widely used self-report measure of perceived stress in the world. Developed by Sheldon Cohen and colleagues in 1983, it does not count stressful events or symptoms - it asks how unpredictable, uncontrollable and overloaded your life has felt over the past month.
The model
What it measures
The PSS-10 measures perceived stress: the degree to which recent life situations are appraised as stressful. It is scored as a single total, but research consistently finds two underlying factors, shown below - and the questions are split evenly between them.
Six negatively worded items tap perceived helplessness (feeling unable to cope or in control), and four positively worded items - reverse-keyed before scoring - tap perceived self-efficacy (feeling on top of things and able to handle problems). A higher total means more perceived stress. The aspects listed under each factor are illustrative facets of how it shows up, not separately scored subscales.
- HPerceived Helplessness
Feeling that life has been unpredictable, uncontrollable and overloading this past month.
Facets: Feeling unable to control important things, Difficulties piling up, Nervous and stressed, Upset by the unexpected.
- SEPerceived Self-Efficacy
Feeling able to cope, in control and on top of things (reverse-keyed before scoring).
Facets: Confident handling problems, Things going your way, On top of things, In control of irritations.
The evidence
Science and validity
The PSS-10 is well validated as an appraisal measure distinct from symptom checklists. Internal consistency is strong (Cronbach's alpha typically about .78 to .91), and a two-factor structure - perceived helplessness and perceived self-efficacy - is reported consistently, even though a single total is the standard score. It predicts depressive and physical symptoms, health behaviours, cortisol responses and susceptibility to infection, and it is sensitive to recent life-event load.
You rate ten questions about the past month on a 5-point frequency scale from 0 (never) to 4 (very often). The four positively worded items are reverse-scored, then all ten are summed to a 0-40 total, where higher means more perceived stress. The PSS has no official clinical cut-off - it is a normal-range appraisal measure - so the result is read against normative means rather than a pass/fail threshold.
Where you stand
How a score becomes a percentile
A raw score only means something against a comparison group. For example, a total perceived-stress score of 20 sits about one standard deviation above the US adult average (where the mean is near 14), placing it around the 84th percentile - more perceived stress this past month than roughly five in six adults. Drag the sliders to see how a score on each factor maps to a percentile; your real result is matched to the population that fits you when you take the test.
The reference data
Benchmarked against the population that fits you
We benchmark your result against the population that actually resembles you, across 25 reference groups.
Each reference group is used as its own benchmark, not to rank one country against another.
How it works
What the questions feel like
Illustrative statements showing the style of the items. These are examples, not the official scored items.
In the last month, how often have you felt unable to control the important things in your life?
Illustrative example in the style of the scale, not an official scored item.
In the last month, how often have you felt difficulties were piling up faster than you could handle?
Illustrative example, not an official scored item.
In the last month, how often have you felt confident about your ability to handle personal problems?
Illustrative reverse-keyed example, not an official scored item.
In the last month, how often have you felt that things were going your way?
Illustrative reverse-keyed example, not an official scored item.
Honest strengths and limitations
Strengths
- The most widely used measure of perceived stress in the world, validated in 25+ languages.
- Very short (about 5 minutes), public domain, and free for non-commercial use.
- Measures the appraisal of stress rather than a symptom list, capturing how life actually feels distinct from clinical checklists.
Limitations
- It is a normal-range appraisal measure, not a clinical screen - a high score signals a stressful month, not a diagnosis.
- It refers to the past month, so scores move with circumstances; the same person can score quite differently at different times.
- Norms are time-, country- and age-sensitive (means decline with age), so percentiles are a guide, not a verdict.
See your full profile
A complete report, matched to the population that fits you, with plain-language interpretation of every trait.
Frequently asked questions
What does the Perceived Stress Scale measure?
It measures perceived stress - how unpredictable, uncontrollable and overloaded your life has felt over the past month. It asks about your appraisal of recent situations rather than counting events or symptoms.
How is the PSS-10 scored?
Each of the ten items is rated 0 (never) to 4 (very often) for the past month. The four positively worded items are reverse-scored, then all ten are summed to a 0-40 total, where higher means more perceived stress. There is no official clinical cut-off; the score is read against normative means.
Is a high PSS score a diagnosis of a stress disorder?
No. The PSS is a normal-range appraisal measure, not a diagnostic or clinical tool. A high score means the past month has felt stressful, which is useful self-knowledge, but it does not diagnose any condition. If stress is affecting your wellbeing, a qualified professional can help.
Is the Perceived Stress Scale free to use?
Yes, for non-commercial research and education, via Sheldon Cohen's lab at Carnegie Mellon (commercial use is licensed separately). On Psychology.me, the free Snapshot gives you a quick read on perceived stress alongside other measures.
Related tests
- Cohen, S., Kamarck, T., & Mermelstein, R. (1983). A global measure of perceived stress. Journal of Health and Social Behavior, 24(4), 385-396.
- Cohen, S., & Williamson, G. (1988). Perceived stress in a probability sample of the United States. In S. Spacapan & S. Oskamp (Eds.), The social psychology of health (pp. 31-67). Sage.
The Perceived Stress Scale is the work of Sheldon Cohen and colleagues (Cohen, Kamarck & Mermelstein, 1983); it is freely available for non-profit research and education via the S. Cohen lab at Carnegie Mellon. This independent informational page describes the instrument.