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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Bibliographic Details
Published in:BMC Med Res Methodol
Main Authors: Heo, Moonseong, Kim, Namhee, Faith, Myles S.
Format: Artigo
Language:Inglês
Published: BioMed Central 2015
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Research Article
Online Access: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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