random-digit dialing
type: Concept
definition: Random-digit dialing (RDD) is a method used to select participants for telephone surveys and for related purposes such as selecting control group subjects in case-control studies. The basis of RDD is the random generation of telephone numbers that are used to contact potential survey respondents or study participants. [Source: Encyclopedia of Epidemiology; Random-Digit Dialing]
broader: statistics and research methods

statistics and research methods
type: Concept
narrower: random-digit dialing

methods
type: Collection
type: ConceptGroup
member: random-digit dialing