Effects of estimated completion time and unconditional gift certificates on questionnaire response.
Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands.|Radboud REshape Innovation Center, Radboud University Medical Center, Nijmegen, The Netherlands.
Marleen M H J
0000-0003-4853-4434
MM
van Gelder
Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands.
Pauline M
PM
Geuijen
Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands.
Jeanne H M
JH
de Vries
Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands.|Department of Paediatrics, Radboudumc Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands.
Nel
N
Roeleveld
D005260:Female; D006801:Humans; D009042:Motivation; D011177:Postal Service; D012201:Reward; D011795:Surveys and Questionnaires
Cohort studies; PREGNANCY; RESEARCH METHODS