English

Web-based surveys are increasingly used in evaluation practice. To our knowledge, there are no guidelines for calculating outcome rates using newly available tracking methods. In a recent study, up to five recruitment e-mails were sent using an e-mail marketing service: a primer, an invitation with a survey link, and three reminders. Hard and soft bounces and opened e-mails were tracked. Outcome rates varied as a function of decisions made regarding these data. We suggest that several outcome rate calculations be presented to assist the reader in assessing these important measures of study quality.

90
Pages
90-98
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