“…The three major steps of developing the HECS (item generation, content validity testing and item analysis) were performed as described by DeVellis (): - Item generation: the authors first reviewed the literature on patient empowerment, motivational interviewing, essential elements of patient education as perceived by family members, the expert consensus on health‐promoting interventions, health education constructs and health literacy educational competencies (Castro et al., ; Coleman et al., ; Kelo et al., ; Levensky et al., ; Maijala et al., ; Whitehead et al., ).
- Content validity testing: a panel of five experts, namely two professors in nursing education (each with more than 20 years of teaching experience), one nursing administrator (more than 20 years of clinical nursing experience) and two certificated diabetes educators (each with more than 15 years of teaching experience), were invited to judge the original 33‐item questionnaires. The content validity was investigated during May and September of 2015.
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