Although a number of instruments have been used to measure health literacy, a key limitation of the leading instruments is that they only measure reading ability or print literacy and, to a limited extent, numeracy. Consequently, the present study aimed to develop a new instrument to measure an individual's health literacy using a more comprehensive and skills-based approach. First, we identified a set of skills to demonstrate and tasks to perform. Next, we selected real-world health-related stimuli to enable measurement of these skills, and then we developed survey items. After a series of cognitive interviews, the survey items were revised, developed into a 38-item instrument, and pilot tested using a Web-based panel. Based on the psychometric properties, we removed items that did not perform as well, resulting in a 25-item instrument named the Health Literacy Skills Instrument. Based on confirmatory factor analysis, the items were grouped into five subscales representing prose, document, quantitative, oral, and Internet-based information seeking skills. Construct validity was supported by correlations with the short form of the Test of Functional Health Literacy in Adults and self-reported skills. The overall instrument demonstrated good internal consistency, with a Cronbach's alpha of 0.86. Additional analyses are planned, with the goal of creating a short form of the instrument.
This instrument shows promise for measuring RSSM. Although it was developed for diabetes programs, its ecological orientation and link to the broad framework of chronic care suggest broader application.
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