Recruiting survey respondents to mailed surveys: controlled trials of incentives and prompts.

@article{Spry1989RecruitingSR,
  title={Recruiting survey respondents to mailed surveys: controlled trials of incentives and prompts.},
  author={V M Spry and Melbourne Hovell and Julian G Sallis and C R Hofsteter and John P. Elder and Craig A. Molgaard},
  journal={American journal of epidemiology},
  year={1989},
  volume={130 1},
  pages={166-72}
}
Three controlled experiments tested the efficacy of 1) a postcard or telephone prompt, 2) a lottery, 3) monetary incentives, and 4) questionnaire length to recruit adult survey respondents to a random sample of residences in San Diego, California, during 1986-1988. In experiment 1, the group randomly assigned to receive a telephone call prenotification plus the lottery incentive responded 26-66% more frequently than did controls (p = 0.02) after a single mailing. The postcard plus lottery was… CONTINUE READING

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