Titre :
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Can incentives undermine intrinsic motivation to participate in epidemiologic surveys ? (2010)
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Auteurs :
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WENEMARK (Marika) : SWE. Centre for Public Health Sciences. Ostergötland County Council. Linköping. ;
Annika-Lindahl NORBERG ;
Asa VERNBY ;
Childhood Cancer Research Unit. Department of Woman and Child Health. Karolinska Institutet. Stockholm. SWE
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Type de document :
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Article
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Dans :
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European journal of epidemiology (vol. 25, n° 4, 2010)
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Pagination :
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231-235
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Langues:
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Anglais
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Mots-clés :
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Incitation
;
Motivation
;
Participation
;
Epidémiologie
;
Enquête épidémiologique
;
Enquête
;
Surveillance
;
Collecte information
;
Taux
;
Autoquestionnaire
;
Autoévaluation
;
Questionnaire
;
Homme
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Résumé :
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[BDSP. Notice produite par INIST-CNRS EoAFlR0x. Diffusion soumise à autorisation]. Response rates to surveys are decreasing. The purpose of this study was to evaluate the use of lottery tickets as incentives in an epidemiologic control group. A self-administered questionnaire was sent to parents in the municipality of Stockholm, Sweden, who were to be used as a control group in a study addressing stress in parents of children with cancer. A stratified random sample of 450 parents were randomized into three incentive groups : (a) no incentive ; (b) a promised incentive of one lottery ticket to be received upon reply ; (c) a promised incentive of one lottery ticket to be received upon reply and an additional lottery ticket upon reply within 1 week. The overall response rate across the three groups was 65.3%. The response rate was highest in the no incentive group (69.3%) and lowest in the one plus one lottery ticket group (62.0%). In a survival analysis, the difference between the two response curves was significant by the log-rank test (P=0.04), with the no incentive group having a shorter time to response than the incentive group. Our findings suggest that the use of lottery tickets as incentives to increase participation in a mail questionnaire among parents may be less valuable or even harmful. Incentives may undermine motivation in studies in which the intrinsic motivation of the respondents is already high.
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