Perceived Stress Scale 14-item

Abstract

The Perceived Stress Scale (PSS-14) is a widely utilized psychometric instrument developed by Cohen, Kamarck, and Mermelstein in 1983. It is designed to quantify the degree to which individuals appraise situations in their lives as stressful, specifically focusing on subjective feelings and thoughts related to stress experienced over the past month.

Distinguishing itself from measures focused solely on objective life events, the PSS-14 captures the respondent’s personal interpretation of daily demands, unpredictability, and perceived ability to cope. It is a 14-item, self-report tool utilizing a 5-point Likert scale, where higher cumulative scores are indicative of greater perceived stress and psychological strain. The scale provides a global measure of perceived stress, capturing the extent to which life circumstances are seen as uncontrollable, unpredictable, and overloading.

Keywords

Perceived Stress Scale, PSS-14, stress measurement, subjective appraisal, psychological assessment, self-report, coping efficacy, health psychology, psychometrics, Cohen scale, psychological strain.

Authors

Sheldon Cohen, Tom Kamarck, Richard Mermelstein, Gail Williamson

Purpose

The primary function of the Perceived Stress Scale (PSS-14) is to provide a global measure of perceived stress. It assesses the extent to which an individual views their life circumstances over the preceding four weeks as uncontrollable, unpredictable, and overloading. This emphasis on cognitive appraisal makes the PSS-14 a powerful tool for measuring psychological strain resulting from recent experiences, rather than merely counting objective stressors.

In research and clinical settings, the PSS-14 is frequently employed in epidemiological studies to investigate the link between subjective stress levels and subsequent health outcomes. Because subjective appraisal is often a stronger predictor of physical illness, mental health disorders, and immune function than objective stressor presence, the scale provides critical insight into the stress-health relationship.

Construct

The PSS-14 measures the psychological construct of perceived stress. This construct is rooted in transactional models of stress, which posit that stress arises from the cognitive appraisal of a mismatch between environmental demands and an individual’s perceived resources for coping. Perceived stress, therefore, encompasses the feelings and thoughts an individual harbors regarding how much they are affected by life’s demands and events.

The 14 items are structured to capture two key dimensions of this construct: feelings of being overwhelmed and unable to cope (measured by seven negatively worded items, reflecting perceived helplessness) and feelings of confidence and mastery (measured by seven positively worded items, reflecting perceived coping efficacy). The total score integrates these components into a single, comprehensive index of subjective psychological distress.

Validity

The Perceived Stress Scale has consistently demonstrated robust psychometric properties, including strong validity across diverse populations. Construct validity is supported by significant correlations with other related psychological measures, such as depressive symptoms (e.g., the CES-D) and anxiety, as well as objective indicators of overall health and illness. The PSS-14 reliably exhibits expected correlations: positive relationships with psychological distress and negative relationships with measures of psychological well-being.

Furthermore, the scale possesses high predictive validity, as scores have been shown empirically to forecast future health outcomes, including susceptibility to infections like the common cold and measurable alterations in immune markers. While discriminant validity generally holds, successfully separating perceived stress from stable personality traits, researchers acknowledge a conceptual overlap with traits such as neuroticism, which is often inherent in subjective self-report instruments.

Reliability

The PSS-14 exhibits strong internal consistency, confirming that the items coherently measure the intended underlying construct. Typical Cronbach’s alpha coefficients across various translations and populations fall reliably within the range of 0.84 to 0.86, indicating high reliability for general use.

Test-retest reliability studies have shown moderate stability over short intervals (e.g., several weeks). This moderate stability is appropriate and expected, given that perceived stress is conceptualized as a state variable that should naturally fluctuate in response to dynamic recent life events and coping successes or failures.

Factor Analysis

Initial Factor Analysis conducted during the scale’s development suggested a single, dominant factor representing global perceived stress. However, subsequent, more sophisticated psychometric investigations, particularly those using confirmatory Factor Analysis, often reveal a persistent two-factor structure.

These two statistically distinct factors are typically identified as: (1) Perceived Helplessness or Lack of Control (derived from the seven negatively worded items) and (2) Perceived Self-Efficacy or Coping Ability (derived from the seven positively worded items). Despite the emergence of this bi-factor model, the high empirical correlation between the two factors strongly supports the continued and widespread practice of utilizing a single total score for efficient research and clinical screening.

Instrument

Test Type: Self-report psychological screening instrument.

Format: 14 items, 5-point Likert scale (0=Never to 4=Very Often). The resulting total score ranges from 0 to 56.

Language Available: Available in numerous translations worldwide, including Spanish, Chinese, German, Arabic, and Italian, reflecting its global applicability.

Population Group: General adult population; extensively used across clinical, student, and community samples.

Age Group: Typically 16 years and older.

Population Details: The scale was originally validated using probability samples of the United States population (Cohen & Williamson, 1988), confirming its robust applicability across diverse demographic groups.

Test Methodology: Respondents are instructed to reflect on their feelings and thoughts over the last month. Scoring involves reversing the scores for the seven positively stated items (items 4, 5, 6, 7, 9, 10, 13) before summing all 14 item scores. Higher scores indicate greater levels of perceived stress.

Keywords

Psychological strain, self-efficacy, coping mechanisms, health outcomes, subjective appraisal, psychological measure, PSS, Cohen scale, perceived helplessness, transactional model.

Authors

Author ORCID Identifier: N/A (Information not provided in source.)

Affiliation Email addresses: N/A (Information not provided in source. General inquiries are often directed to the original author’s university website: http://www.psy.cmu.edu/~scohen/scales.html)

Correspondence Address: N/A (Information not provided in source.)

Permissions & Fee and Test Year

The PSS-14 is generally available for non-commercial research and educational use at no charge, provided appropriate citation is given to the original authors (Cohen et al., 1983). Users requiring commercial use or specific licensing should contact the original authors or their affiliated institution.

The scale was initially published in 1983, with key validation work following in 1988.

The original PDF of the 1983 publication can be downloaded here: Link to full-text (pdf)

The original PDF of the 1988 publication can be downloaded here: Link to full-text (pdf)

Reference’s

• Cohen, S., Kamarck, T., Mermelstein, R. (1983). A global measure of perceived stress. Journal of Health and Social Behavior, 24, 385-396.
• Cohen, S., & Williamson, G. (1988). Perceived stress in a probability sample of the United States. In S. Spacapam & S. Oskamp (Eds.), The social psychology of health: Claremont Symposium on applied social psychology. Newbury Park, CA: Sage.
• Scale details are maintained and updated by the primary author, with content reflecting an update from July 8, 2008.

Items of the Perceived Stress Scale 14-item

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

Instructions: The questions in this scale ask you about your feelings and thoughts during the last month. In each case, you will be asked to indicate your response by placing an “X” over the circle representing HOW OFTEN you felt or thought a certain way. Although some of the questions are similar, there are differences between them and you should treat each one as a separate question. The best approach is to answer fairly quickly. That is, don’t try to count up the number of times you felt a particular way, but rather indicate the alternative that seems like a reasonable estimate.

	Never	Almost Never	Sometime	Fairly Often	Very Often
1. In the last month‚ how often have you been upset because of something that happened unexpectedly?
2. In the last month‚ how often have you felt that you were unable to control the important things in your life?
3. In the last month‚ how often have you felt nervous and “stressed”?
4. In the last month‚ how often have you dealt successfully with day to day problems and annoyances
5. In the last month‚ how often have you felt that you were effectively coping with important changes that were occurring in your life?
6. In the last month‚ how often have you felt confident about your ability to handle your personal problems?
7. In the last month‚ how often have you felt that things were going your way?
8.  In the last month‚ how often have you found that you could not cope with all the things that you had to do?
9. In the last month‚ how often have you been able to control irritations in your life?
10. In the last month‚ how often have you felt that you were on top of things?
11. In the last month‚ how often have you been angered because of things that were outside your control?
12. In the last month‚ how often have you found yourself thinking about things that you have to accomplish
13. In the last month‚ how often have you been able to control the way you spend your time
14. In the last month‚ how often have you felt difficulties were piling up so high that you could not overcome them?