Development of a resilience item bank and short forms.

PURPOSE: The purpose of this study was to develop a publicly available, psychometrically sound item bank and short forms for measuring resilience in any population, but especially resilience in individuals with chronic medical conditions or long-term disability. RESEARCH METHODS: A panel of 9 experts including disability researchers, clinical psychologists, and health outcomes researchers developed a definition of resilience that guided item development. The rigorous methodology used focus groups, cognitive interviews, and modern psychometric theory quantitative methods, including item response theory (IRT). Items were administered to a sample of people with chronic medical conditions commonly associated with disability (N = 1,457) and to a general population sample (N = 300) representative of the Unites States general population with respect to age, gender, race, and ethnicity. RESULTS: The final item bank includes 28 items calibrated to IRT with the scores on a T-metric. A mean of 50 represents the mean resilience in the general population sample. Four and eight item short forms are available, and their scores are highly correlated with the item bank score (r >/= .94). Reliability is excellent across most of the resilience continuum. Initial analyses provide strong support for validity of the score. CONCLUSIONS: The findings support reliability and validity of the University of Washington Resilience Scale (UWRS) for assessing resilience in any population, including individuals with chronic health conditions or disabilities. It can be administered using computerized adaptive testing or by short forms. (PsycINFO Database Record (c) 2020 APA, all rights reserved).