Perceived Health Competence Scale (PHCS)

Abstract

The Perceived Health Competence Scale (PHCS) is an 8-item instrument designed to measure an individual’s perceived ability to manage and influence their personal health outcomes. Developed by Smith, Wallston, and Smith in 1995, the scale assesses the degree to which a person believes they possess the necessary skills and resources to successfully engage in effective health behavior and cope with health challenges. The PHCS is widely utilized in health psychology and behavioral medicine research to predict adherence to treatment regimens, proactive health management, and overall health status.

Keywords

Perceived Health Competence Scale, PHCS, health competence, self-efficacy, health locus of control, health behavior, psychological measurement, health promotion

Authors

M. S. Smith, K. A. Wallston, C. A. Smith

Purpose

The primary purpose of the PHCS is to provide a concise and reliable measure of an individual’s sense of personal effectiveness regarding their health. Unlike measures of generalized self-efficacy, the PHCS specifically targets the domain of health management, capturing beliefs about one’s ability to implement health plans, find solutions to health problems, and achieve health-related goals.

This psychological assessment tool is valuable for researchers and clinicians seeking to understand the psychological determinants of positive health outcomes. High scores on the PHCS typically indicate a strong belief in one’s capacity for effective self-care and health regulation, which is often predictive of greater engagement in preventative health actions.

Construct

The PHCS measures the construct of Perceived Health Competence (PHC). This construct is rooted in social cognitive theory and is conceptually distinct from, yet related to, concepts such as health locus of control and general self-efficacy. PHC specifically reflects an individual’s subjective appraisal of their capacity to handle health-related situations effectively and achieve desired health states.

The scale focuses on perceived mastery over health challenges and the belief that personal efforts translate into tangible health improvements. The items tap into both the perceived ability to undertake actions (e.g., succeeding in projects) and the perceived effectiveness of those actions (e.g., efforts being effective, plans working out well).

Validity

Initial validation studies by Smith, Wallston, and Smith (1995) demonstrated strong empirical support for the PHCS. Construct validity was established through correlations with related measures, showing expected positive associations with internal health locus of control and general self-efficacy, and negative associations with powerful others and chance health locus of control.

Subsequent research, such as that conducted by Marks and Lutgendorf (1999) and Dempster and Donnelly (2008), confirmed the scale’s utility and validity across different populations, including older adults and patients in primary care settings. The PHCS has shown significant predictive validity, often correlating strongly with actual health behaviors, illness symptom reporting, and adjustment to chronic conditions.

Reliability

The PHCS exhibits high levels of internal consistency across various samples. In the original 1995 study, the scale demonstrated excellent reliability, with Cronbach’s alpha coefficients typically ranging from 0.82 to 0.88. This indicates that the eight items consistently measure the same underlying construct of perceived health competence.

Test-retest reliability has also been deemed acceptable, suggesting the scale provides stable measurements of the construct over time, assuming no significant intervening life events drastically alter the individual’s health status or general self-perception of competence.

Factor Analysis

Factor analysis of the PHCS consistently supports a unidimensional structure. The scale is designed to measure a single, cohesive factor—the overall sense of competence in managing one’s health. The original confirmatory factor analysis confirmed that all eight items load strongly onto this singular factor, reinforcing its interpretation as a measure of global perceived health competence rather than multiple facets of health management.

Instrument

Test Type: Self-report psychological inventory

Format: 8 items administered using a 6-point Likert scale

Language Available: Primarily English; translated versions exist (e.g., Spanish, German, UK English validation)

Population Group: General adult population; validated for use in older adults and clinical samples

Age Group: Adolescents and adults (typically 18 years and older)

Population Details: Used in both healthy and chronically ill populations to assess proactive coping and health management beliefs.

Test Methodology: Respondents rate their agreement with each statement on a scale ranging from (1) Strongly Disagree to (6) Strongly Agree. Items 2, 3, 6, and 7 are reverse-scored, and scores are summed to yield a total PHCS score, with higher scores indicating greater perceived health competence.

Keywords

psychometrics, self-care, health management, scale development, health psychology, psychological scale, internal consistency, validity testing

Authors

Author ORCID Identifier: Not specified in source material.

Affiliation Email addresses: Not specified in source material.

Correspondence Address: Not specified in source material (Likely Vanderbilt University Medical Center for Wallston at time of publication).

Permissions & Fee and Test Year

The PHCS was originally published in 1995. The scale is generally available for non-commercial academic research use, though researchers should confirm specific usage rights with the primary authors or the journal publisher (Health Education Research: Theory & Practice). The foundational publication is accessible via ResearchGate.

The original instrument can be found via this publication link: https://www.researchgate.net/publication/13148472

Reference’s

• Smith, M. S., Wallston, K. A., & Smith, C. A. (1995). The development and validation of the Perceived Health Competence Scale. Health Education Research: Theory & Practice, 10(1), 51–64.
• Marks, G. R. and Lutgendorf, S. K. (1999) Perceived Health Competence and Personality Factors Differentially Predict Health Behaviors in Older Adults. Journal of Aging and Health, 11, 221-239.
• Dempster, M. and Donnelly, M. (2008) Validity of the Perceived Health Competence Scale in a UK Primary Care Setting. Psychology, Health, and Medicine, 13, 123-127.
• Smith, Wallston, & Smith, (1995). Perceived Health Competence Scale. In: Simmons C. A., Lehmann P. (eds). Tools for strengths-based assessment and evaluation, New York, NY: Springer, pp. 136-137. (2013).

Items of the Perceived Health Competence Scale (PHCS)

Response format: (1) strongly Disagree to (6) strongly Agree

Items:

1. I handle myself well with respect to my health
2. No matter how hard I try‚ my health just doesn’t turn out the way I would like. (R)
3. It is difficult for me to find effective solutions to the health problems that come my way. (R)
4. I succeed in the projects I undertake to improve my health.
5. I’m generally able to accomplish my goals with respect to my health.
6. I find my efforts to change things I don’t like about my health are ineffective. (R)
7. Typically‚ my plans for my health don’t work out well. (R)
8. I am able to do things for my health as well as most other people.