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Statistical power as a function of Cronbach alpha of instrument questionnaire items
BACKGROUND: In countless number of clinical trials, measurements of outcomes rely on instrument questionnaire items which however often suffer measurement error problems which in turn affect statistical power of study designs. The Cronbach alpha or coefficient alpha, here denoted by C(α), can be use...
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| Publicado no: | BMC Med Res Methodol |
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| Main Authors: | , , |
| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
BioMed Central
2015
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| Assuntos: | |
| Acesso em linha: | https://ncbi.nlm.nih.gov/pmc/articles/PMC4606843/ https://ncbi.nlm.nih.gov/pubmed/26467219 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/s12874-015-0070-6 |
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