Postcard reminders versus replacement questionnaires and mail survey response rates from a professional population

Nonresponse is a major problem in the use of mail questionnaires. The great number of variables that can influence response rates has resulted in an extensive literature on the subject, but a literature that is restricted to few examples of replication. Moreover, many of the studies reported in the literature were not conducted under controlled conditions. This article presents the results of a study using a single-factor experimental design to test the efficacy of two different follow-up forms in improving response rates. The results indicate that replacement questionnaires are to be preferred over postcard reminders when using a one-time follow-up in surveying a professional population.