Random Digit Dialing


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Random Digit Dialing

The practice in which a computer generates random telephone numbers to dial. This is done in some phone surveys to ensure a random sample. Random digit dialing can include unlisted phone numbers. It is cost effective in some marketing campaigns, provided the area being dialed has a relatively high phone ownership rate. See also: Do not call list.
References in periodicals archive ?
General public surveys were all conducted between December 2006 and January 2007, using random digit dialing in each country to reach representative samples of adult population aged 15 and older.
A Computer Assisted Telephone Interviewing (CATI) facility and Random Digit Dialing (RDD) technology were used.
Roper Public Affairs conducted this study using Random Digit Dialing (RDD) methodology from September 22 through September 24, 2006.
The CATI system uses a random digit dialing (RDD) sampling method that insures a true random selection among all telephone numbers and provides a truly independent sample for each wave.
Results are based on OmniTel(TM) telephone interviews conducted from May 19 - 21, 2006 among a nationally representative sample of 1,004 US adults using a random digit dialing (RDD) probability sample of all telephone households in the continental United States.