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PSS-10 validity and reliability: what the research shows and what it does not

The PSS-10 is among the best-studied stress questionnaires. A review of 19 studies found acceptable psychometric properties and judged the 10-item version better than the 14- and 4-item versions. [3] It also found that test-retest reliability and criterion validity were rarely studied. [3] None of this makes it a diagnostic test. [2]

Where did the PSS-10 come from?

The PSS was published in 1983 by Cohen, Kamarck, and Mermelstein. [1] The 10-item version was derived from the 14-item scale five years later, using factor analysis of data from 2,387 US residents. [3] The Carnegie Mellon site hosts the developers' scales and lists translations into many languages. [2]

How reliable is it?

Reliability here means internal consistency, how well the items hang together. The review used Cronbach's alpha above .70 as the minimum conventional standard, and reported that the PSS-14 met it in 11 of 12 studies where it was evaluated. It judged the 10-item version superior to the 14-item and the 4-item version the weakest. [3] In the Hong Kong worker study, alpha was .70 for the whole scale. [4]

The review found test-retest reliability, whether scores are stable over time in the same person, relatively rarely evaluated. [3] That matters if you compare your own scores month to month.

Does it measure one thing or two?

Whether the PSS-10 measures one thing or two is debated. In the Hong Kong study, a two-factor model fitted well and a one-factor model fitted poorly. [4]

One factor contained the six negatively worded items and the other the four positively worded ones. The factors were only weakly correlated, which the author said differs from earlier studies. [4] Whether the positive items reflect a separate "coping" idea or a wording effect is not settled. The practical point is that the total is the standard way to use the scale.

What does it relate to in workers?

In the 992 Hong Kong service workers, PSS-10 totals correlated with perceived workload (r = 0.17), and with burnout exhaustion (0.48), cynicism (0.42), and reduced efficacy (0.28), and negatively with work engagement. [4] These are group-level correlations in one self-reported, convenience sample of mostly women, so they show a link, not a cause, and not a rule for any one person. [4]

What does the validity evidence not establish?

That a score predicts illness or absence in you, that a cut-off exists, or that an online adaptation behaves like the research one. The scale was designed for research on perceived stress, and its developers state it is not diagnostic. [2] The evidence base is mostly college students and workers, and the review called for validation in more diverse populations. [3]

What should I check before trusting an online stress score?

Check these things before you trust an online stress score:

  • Does it say which version it is and cite the original research?
  • Does it reverse the right items and show how it calculates the total?
  • Does it say there are no official cut-offs, or label any bands as unofficial?
  • Does it avoid diagnosing, and say when to see a doctor?
  • Does it say how it treats your data?

Sources and further reading

These links open external research and health-information websites.

  1. Cohen, Kamarck, and Mermelstein (1983): A global measure of perceived stress. Journal of Health and Social Behavior, 24(4), 385-396
    The original paper. The hosted copy is a scanned image, so we relied on how it is described in the review by Lee (2012) and on LuriaLab's citation.
  2. Carnegie Mellon University: The Perceived Stress Scale
    The developers' page: versions, "not a diagnostic instrument; there are no score cut-offs", comparison within your own sample, time-frame comment, and translations. Read on 24 October 2026.
  3. Lee (2012): Review of the psychometric evidence of the Perceived Stress Scale. Asian Nursing Research, 6(4), 121-127
    A review of 19 articles on the PSS's psychometric properties. Full text read.
  4. Ng (2013): Validation of the 10-item Chinese Perceived Stress Scale in elderly service workers: one-factor versus two-factor structure. BMC Psychology, 1, 9
    A study of 992 workers in Hong Kong. Convenience sample, over 83% women, self-report only.

This page is educational. A questionnaire score cannot establish a diagnosis or explain the cause of your symptoms. If you are struggling, speak with a doctor or mental health professional, whatever your score. Read when to get help for work stress or find a helpline in your country.