Scratch lottery tickets are a poor incentive to respond to mailed questionnaires.

BMC Medical Research Methodology
Vilhjalmur Finsen, Andreas H Storeheier

Abstract

It has been demonstrated that the enclosure of money with a mailed questionnaire increases the response rate significantly. We evaluated scratch lottery tickets as an alternative to cash. 1500 randomly selected Norwegians between the ages of 40 and 65 years were sent a short questionnaire. 250 received one lottery scratch ticket worth 20 Norwegian kroner (approximately 3 USD) together with the questionnaire, 250 received two scratch tickets, and 250 were promised two scratch tickets if they replied within one week. A fourth group of 250 persons received a 50 kroner banknote with the questionnaire. The remaining 500 letters served as controls. The overall response rate after 6 weeks was 77%. Logistic regression analysis showed that only the 50 kroner group had a response rate that was statistically significantly higher than the controls (p < 0.0001). It was also significantly higher than that in any of the other incentive groups (p < 0.0001, p < 0.004 and p < 0.0001 respectively). Female sex (p < 0.001) and age (p < 0.002) increased the response rate significantly. It is possible that the recipients scratched their cards before completing the questionnaire, and that it was a disincentive for the majority that they did not win an...Continue Reading

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Citations

Apr 21, 2012·BMC Medical Research Methodology·Frank OlsenJan Abel Olsen
Jul 10, 2009·The Cochrane Database of Systematic Reviews·Philip James EdwardsSarah Pratap
Jul 7, 2016·Tidsskrift for den Norske lægeforening : tidsskrift for praktisk medicin, ny række·Ragnhild E Ørstavik, Geir Wenberg Jacobsen
Jul 7, 2016·Tidsskrift for den Norske lægeforening : tidsskrift for praktisk medicin, ny række·Dagrun Kyte GjøsteinMichael Bretthauer
May 30, 2008·Birth·Vilhjalmur FinsenOlaf Gjerløw Aasland
Feb 17, 2010·European Journal of Epidemiology·Marika WenemarkAnnika Lindahl Norberg
Sep 17, 2016·Tidsskrift for den Norske lægeforening : tidsskrift for praktisk medicin, ny række·Dagrun Kyte GjøsteinMagnus Løberg
Sep 17, 2016·Tidsskrift for den Norske lægeforening : tidsskrift for praktisk medicin, ny række·Vilhjalmur Finsen

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