Why are reminders being sent to respondents who have already completed the survey?
Due to security and confidentiality issues, everyone surveyed will receive reminders, even those who have already responded. When submitted, survey responses and identifying information are immediately separated, so we have no way of knowing who has already responded. Reminders, therefore, are distributed to everyone in the survey group.Reminders are also sent because research indicates that the single highest predictor of response rates in web-based surveys is the number of contacts made, including reminders. (See: Cook, Heath, and Thompson, “A meta-analysis of response rates in web- or internet-based surveys”, Educational and Psychological Measurement, v.60, 2000, p.821-836.
Due to security and confidentiality issues, everyone surveyed will receive reminders, even those who have already responded. When submitted, survey responses and identifying information (i.e., email and network addresses) are immediately separated, so we have no way of knowing who has already responded — just that some people have. Reminders, therefore, are distributed to everyone in the survey group. Reminders are also sent because research indicates that the single highest predictor of response rates in web-based surveys is the number of contacts made, including reminders.
