Description

The RAND Mental Health Inventory (MHI-38) is a psychometric instrument designed to assess mental health, psychological distress, and subjective well-being. It was developed within broader health and functioning research and provides a multidimensional assessment of an individual’s psychological condition.

The MHI-38 does not focus exclusively on negative symptoms. It also assesses positive aspects of psychological functioning, allowing for a broader view of both distress and well-being.

Purpose

The primary purpose of the MHI-38 is to assess mental health and emotional functioning.

The instrument may be used to:

  • describe levels of psychological distress and well-being,
  • examine differences between individuals or population groups,
  • monitor changes in mental health over time,
  • and evaluate the impact of therapeutic or supportive interventions.

It may also be used in research investigating the relationship between mental health and social, demographic, or clinical factors.

Structure and Main Dimensions

The MHI-38 contains 38 items and is organized around several dimensions reflecting different aspects of mental health.

According to the provided material, five main areas are included:

  • General Mental Health
  • Anxiety
  • Depression
  • Impulsivity
  • Support from Others

This multidimensional structure allows the instrument to address both negative emotional states and more positive aspects of psychological functioning.

Scoring

Responses are rated on a 6-point Likert scale, ranging from:

1 = Never
to
6 = Always

According to the provided material, item scores are summed to produce scores for the different dimensions and may then be transformed to a 0–100 scale.

Higher scores indicate better mental health and greater well-being, provided that negatively worded items are appropriately reverse-scored where required.

The exact scoring procedure should follow the manual or instructions associated with the specific version of the instrument being used.

Data Analysis and Use

MHI-38 results may be analyzed at the level of individual dimensions and, where appropriate, as broader summary indicators.

In research applications, possible analyses include:

  • descriptive statistics to summarize mental health levels,
  • group comparisons,
  • correlation analyses with social, demographic, or clinical variables,
  • and change analyses before and after therapeutic or other interventions.

The simultaneous assessment of psychological distress and well-being makes the instrument useful for studying mental health as a broad construct rather than only as the absence or presence of psychopathology.

Psychometric Evaluation

When the MHI-38 is used, it is important to evaluate the reliability, validity, and factor structure of the specific version being administered.

Internal consistency may be assessed using appropriate reliability coefficients, while structural validity may be examined through factor-analytic methods.

Particular attention should also be given to validity across different linguistic and cultural populations so that scores are interpreted appropriately for the target group.

Applications

The MHI-38 may be used in clinical psychology, psychiatry, health psychology, epidemiology, and quality-of-life research.

It may contribute to:

  • assessing mental health in general and clinical populations,
  • monitoring treatment outcomes,
  • examining factors related to psychological distress or well-being,
  • and evaluating mental health promotion programs.

The MHI-38 should not be used as a stand-alone diagnostic instrument. Its results are best interpreted alongside clinical information and other relevant assessment data.

References

Veit, C. T., & Ware, J. E. (1983). The structure of psychological distress and well-being in general populations. Journal of Consulting and Clinical Psychology, 51(5), 730–742.

Stewart, A. L., Sherbourne, C. D., Hays, R. D., & Wells, K. B. (1992). Summary and discussion of MOS measures. In A. L. Stewart & J. E. Ware (Eds.), Measuring Functioning and Well-Being: The Medical Outcomes Study Approach (pp. 345–371). Duke University Press.

Hays, R. D., Sherbourne, C. D., & Mazel, R. M. (1995). User’s Manual for the Medical Outcomes Study (MOS) Core Measures of Health-Related Quality of Life. RAND Corporation.

Shumaker, S. A., & Naughton, M. J. (1995). The international assessment of health-related quality of life: A theoretical perspective. In J. Orley & W. Kuyken (Eds.), Quality of Life Assessment: International Perspectives (pp. 3–10). Springer.

Ware, J. E., Kosinski, M., & Dewey, J. E. (2000). How to Score Version 2 of the SF-36 Health Survey. QualityMetric Incorporated.