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The effect of using social pressure in cover letters to improve retention in a longitudinal health study: an embedded randomised controlled retention trial
BACKGROUND: Retention of participants in cohort studies is important for validity. One way to promote retention is by sending a persuasive cover letter with surveys. The study aimed to compare the effectiveness of a covering letter containing social pressure with a standard covering letter on retent...
| Autores principales: | , , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
BioMed Central
2017
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5520383/ https://www.ncbi.nlm.nih.gov/pubmed/28728603 http://dx.doi.org/10.1186/s13063-017-2090-5 |