Stig-9 is a free and open source self-report questionnaire to measure perceived mental illness stigma. It assesses the extent to which respondents expect negative societal beliefs, feelings, and behaviors towards people who are supposed to have a mental disorder.
Perceived mental illness stigma is a psychological construct. It is a key component of the modified labeling theory. According to this theory, negative societal beliefs about people with mental disorders are part of western culture (e.g. people with mental disorders are seen as being less trustworthy, weak, less intelligent, and dangerous). As a product of socialization, individuals familiarize themselves with these beliefs, and - to a certain degree - expect negative attitudes, feelings and behaviors towards people with mental disorders (for example rejection when applying for a job, or reluctance to enter into a close relationship).
The Stig-9 questionnaire consists of nine items and one example item. On a four point Likert scale, respondents indicate the degree to which they expect negative societal beliefs, feelings, and behaviors towards someone who has been treated for a mental disorder. Response categories are:
- disagree 
- somewhat disagree 
- somewhat agree 
- agree 
The item responses are summarized in a sum score (range 0-27 points). "High scores on Stig-9 correspond with high expectations of negative societal beliefs, feelings, and behaviors towards 'mentally ill' people."
The psychometric properties were analyzed in a study conducted at the University Medical Center Hamburg-Eppendorf in Germany. The authors surveyed a large clinical sample of approximately 1,000 patients at the Department of Psychosomatic Medicine and Psychotherapy. They found excellent item- and scale characteristics, high internal consistency, and evidence for validity. In addition, they determined reference scores for the study population. Currently, a manuscript that describes the development and psychometric evaluation of Stig-9 is under review for publication in a scientific journal.
To date, a German and an English version exist.
Stig-9 is licensed under the terms of Creative Commons BY 3.0 Unported License. Therefore, everybody is free to use, copy, and modify the questionnaire as long as the authors are cited.
- Gierk, Benjamin; Murray, Alexandra M.; Kohlmann, Sebastian; Löwe, Bernd. "Measuring the perceived stigma of mental illness with Stig-9: A re-conceptualisation of the Perceived-Devaluation-Discrimination-Scale.". submitted.
- Link, Bruce (1987). "Understanding Labeling Effects in the Area of Mental Disorders: An Assessment of the Effects of Expectations of Rejection". American Sociological Review 52 (1): 96–112. doi:10.2307/2095395.
- Link, Bruce G.; Cullen Frances T.; Struening E.; Shrout Patrick E. (1989). "A Modified Labeling Theory Approach to Mental Disorders: An Empirical Assessment". American Sociological Review 54 (3): 400–423. doi:10.2307/2095613.