Comparison of Two Survey Method based on Response Distribution: Mail versus Telephone 公开

Zhang, Roy Liu (2011)

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This paper focused on whether there was any difference in the response distribution between two survey modes conducted through mail and telephone surveys. The questionnaires were given to pediatricians, who are part of the India Academy of Pediatrics and work at various locations in India. Both survey modes have a sample size of 400, but only 36% responded to the mail surveys and 57% responded to the telephone surveys. The results found that pediatricians in both telephone and mail surveys agreed for the majority of survey questions but to a different degree on particular items. It was found that pediatricians mostly agreed that Indian children were likely to contract polio and had a 14 percentage points difference in degree of agreement (p= 0.5507) [Δ = telephone % - mail %], reported in percentage points. With regards to "importance of disease eradication" pediatricians agreed between both surveys that polio is "important" (Δ < 1, p= 0.4227). However, pediatricians were divided on the importance of measles eradication with a p=0.0006 and Δ is approximately 8 percentage points. As regards to the "Likelihood" of eradicating polio, pediatricians agreed that for it is "likely" (Δ < 1, p= 0.4591). However, for the likelihood of eradicating measles, pediatricians were divided in their response (Δ=22, p= 0.0033), where more telephone respondents chose "likely". Lastly, pediatricians were also divided on both the parent's' responsibility on child vaccination (Δ≈8, p=0.0024) as well as their role on the delivery of child vaccination (Δ = 14, p=0.0084). Generally, there might be a subtle pattern where pediatricians on the telephone tend to respond with more agreeable and socially expected answers. In particular, there were more telephone responses projecting a stronger emphasis on the likelihood of children contracting "vaccine-able" diseases compared to the mail survey responses. The response distribution did show evidence of potential interviewer effect in the telephone survey.

Table of Contents

Chapter I

Introduction & Background...1

Chapter II

Literature Review...5

Chapter III


Chapter IV


Chapter V



Appendix A...40

Appendix B...45

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