Random digit dialing
Random digit dialing (RDD) is a method for selecting people for involvement in telephone statistical surveys by generating telephone numbers at random. Random digit dialing has the advantage that it includes unlisted numbers that would be missed if the numbers were selected from a phonebook. In populations where there is a high telephone-ownership rate, it can be a cost efficient way to get complete coverage of a region.
RDD is widely used for statistical surveys, including election opinion polling [1] and selection of experimental control groups [2].
An important consideration in random digit dialing surveys is bias introduced by non-responders. Response rate calculation can be imprecise because it can be difficult to determine whether certain numbers are interviewable. [3] [4] Non-response bias can be a problem if responders differ from non-responders for the measured variables. For example, nonresponders may be unresponsive because they work multiple minimum-wage jobs. [5]
References
- ^ Donald P. Green, Alan S. Gerber (2002-05-05). "Enough Already with Random Digit Dialing: A Proposal to Use Registration-Based Sampling to Improve Pre-Election Polling" (PDF).
{{cite journal}}: Cite journal requires|journal=(help) - ^ Sara H. Olson, Jennifer L. Kelsey; et al. (1992-01-15). "Evaluation of Random Digit Dialing as a Method of Control Selection in Case–Control Studies".
{{cite journal}}: Cite journal requires|journal=(help); Explicit use of et al. in:|author=(help) - ^ Roberta L. Sangster (2003-06-10). "Calling Effort and Nonresponse for Telephone Panel Surveys" (PDF).
{{cite journal}}: Cite journal requires|journal=(help) - ^ James T. Massey, Dan O'Connor, Karol Krotki (1997). "Response Rates in Random Digit Dialing (RDD) Telephone Surveys" (PDF).
{{cite journal}}: Cite journal requires|journal=(help)CS1 maint: multiple names: authors list (link) - ^ Peter E. De Michele. "Nonresponse" (PDF). Responsive Management.
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Sources
- Wen-Fu P. Shih (1980). "An evaluation of random digit dialing household survey" (PDF).
{{cite journal}}: Cite journal requires|journal=(help) - Donna J. Brogan1, Maxine M. Denniston; et al. (2001-06-01). "Comparison of Telephone Sampling and Area Sampling: Response Rates and Within-Household Coverage". American Journal of Epidemiology.
{{cite journal}}: Cite journal requires|journal=(help); Explicit use of et al. in:|author=(help)CS1 maint: numeric names: authors list (link)
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