Testing the Impact of Mixed‐Mode Designs (Mail and Web) and Multiple Contact Attempts within Mode (Mail or Web) on Clinician Survey Response
该实验比较了两种混合模式与两种单一模式调查设计对临床医生HPV疫苗接种知识态度调查的回应率和无应答偏差的影响，发现混合模式回应率更高，且无应答偏差无显著差异。
OBJECTIVE: To compare response rate and nonresponse bias across two mixed-mode survey designs and two single-mode designs. DATA SOURCES: This experiment was embedded in a clinician survey of knowledge and attitudes regarding HPV vaccination (n = 275). STUDY DESIGN: Clinicians were randomly assigned one of two mixed-mode (mail/web or web/mail) or single-mode designs (mail-only/web-only). Differences in response rate and nonresponse bias were assessed. PRINCIPAL FINDINGS: Using a multiple-contact protocol increased response, and sending a web survey first provided the more rapid response. Overall, the mixed-mode survey designs generated final response rates approximately 10 percentage points higher than their single-mode counterparts, although only the final response differences between the mail-only and web/mail conditions attained statistical significance (32.1 percent vs. 48 percent, respectively; p = .005). Observed differences did not result in nonresponse bias. CONCLUSIONS: Results support mixing modes of survey administration and web-based data collection in a multiple contact survey data collection protocol.