TELEPHONE SURVEYS
For telephone surveys, ISR selects respondents by random digit dialing (RDD), followed by a random selection of respondents within households.
To maximize response rates and sample representativeness, our usual practice is to make at least 12 attempts to reach a household, on varying days of the week and times of the day.
Telephone surveys are conducted from our centralized Computer Assisted Telephone Interviewing (CATI) laboratory with 75 workstations. To ensure the quality of the data, supervisors monitor interviews in progress.
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