A 67-Item Stress Resilience item bank showing high content validity was developed in a psychosomatic sample

Abstract

Objectives: To develop the first item bank to measure stress resilience (SR) in clinical populations. Study Design and Setting: Qualitative item development resulted in an initial pool of 131 items covering a broad theoretical SR concept. These items were tested in n = 521 patients at a psychosomatic outpatient clinic. Exploratory and confirmatory factor analysis, as well as other state-of-the-art item analyses and item response theory were used for item evaluation and calibration of the final item bank. Results: Of the initial item pool of 131 items, we excluded 64 items (54 factor loading <0.5, four residual correlations >0.3, two nondiscriminative item response curves, and four differential item functioning). The final set of 67 items indicated sufficient model fit in confirmatory factor analysis and item response theory analyses. In addition, a 10-item short form with high measurement precision (SE ≤ 0.32 in a theta range between −1.8 and +1.5) was derived. Both the SR item bank and the SR short form were highly correlated with an existing static legacy tool (Connor-Davidson Resilience Scale). Conclusion: The final SR item bank and 10-item short form showed good psychometric properties. When further validated, they will be ready to be used within a framework of computer-adaptive tests for a comprehensive assessment of the stress construct.

Publication
In: Journal of Clinical Epidemiology, (100), 8
Nina Obbarius
Nina Obbarius
Psychometrics and Health Outcomes
Felix Fischer
Felix Fischer
Group Leader Psychometrics and Health Outcomes

Psychologist with a weakness for quantitative data analysis

Alexander Obbarius
Alexander Obbarius
Psychometrics and Health Outcomes
Sandra Nolte
Sandra Nolte
Psychometrics and Health Outcomes
Gregor Liegl
Gregor Liegl
Psychometrics and Health Outcomes
Matthias Rose
Matthias Rose
Department Head

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