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Health Dynamics Inventory

Stephen Saunders, Ph.D.
James Wojcik, Ph.D.

Technical Information

The normative sample for the HDI included 2,161 patients and 1,574 nonpatients.

Reliability and Validity
In order to evaluate the reliability of the HDI, responses given by the sample of persons seeking outpatient mental health services were compared to those given by the sample of nonpatients. The internal consistencies of the scales were computed using both Cronbach’s alpha coefficient and the split-half (Guttman) statistic. In addition, three sets of analyses were conducted to evaluate validity of the items, scales, and subscales. Results indicated that HDI scales and subscales are both psychometrically reliable and valid. Scientific validation details and diverse case studies are provided in the HDI Technical Manual to show its application in a number of situations and contexts and to clarify the use of HDI in practice.
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Interpretive Reports
Interpretive Reports provide scores graphically and numerically, as well as a narrative text to aid mental health professionals in the interpretation process.

Health Summary Reports 

Health Summary Reports are a subset of the Interpretive Report. They are ideal for rapid analysis and treatment decisions in health care settings where the full Interpretive Report may be unnecessary.

Progress Summary Reports
HDI Progress Summary reports are an easy way to compare up to three administrations of either Parent or Self HDI completed tests. This report allows the clinician to graphically demonstrate change and further needs to clients or administrators, and to target further treatment.

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Research Library

An Evaluation of the Utility of Statistical Versus Clinical Significance in Determining Improvement in Alcohol and Other Drug (AOD) Treatment in Correctional Settings

Health Dynamic Resources: Overview of the Health Dynamic Inventory

The Reliability and Validity of a Brief Self-Report Questionnaire to Screen for Mental Health Problems: The Heath Dynamics Inventory
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For more information on the HDI click here.Back to the top

About the Author

Stephen Saunders, Ph.D.
Stephen Saunders, Ph.D. is Associate Professor in the Department of Psychology at Marquette University in Milwaukee, Wisconsin. He is the Director of Clinical Training in the department's doctoral clinical psychology program. He earned his Ph.D. at Northwestern University in 1990.

James Wojcik, Ph.D.
James Wojcik, Ph.D. is Chief Psychologist and Director of Training at Human Services, Inc. in Washington County, Minnesota. He earned his Ph.D. from the California School of Professional Psychology in 1984.
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Stephen Saunders, Ph.D. & James Wojcik, Ph.D.

Age Range HDI–Parent: parents of children 4 to 19 years old
HDI–Self: 14 and older

Administration Time 10 to 15 minutes

Administration Type
  • Self-report
  • Parent-completed

Qualification Level B