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.

Muslims in Europe: Basis for Greater Understanding Already Exists

However, representativeness of participants may also be a problem in studies that use traditional methods for enrolling participants such as random digit dialing (9).

This problem also is similar to telephone surveys using random digit dialing (10).