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Improving participation rates by providing choice of participation mode: two randomized controlled trials
BACKGROUND: Low participation rates reduce effective sample size, statistical power and can increase risk for selection bias. Previous research suggests that offering choice of participation mode can improve participation rates. However, few head-to-head trials compared choice of participation mode...
| Autores principales: | , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
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BioMed Central
2015
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4392857/ https://www.ncbi.nlm.nih.gov/pubmed/25886757 http://dx.doi.org/10.1186/s12874-015-0021-2 |