For residential telephone surveys we use a Random Digit Dial sample, which we buy in fully updated, purged of dead numbers and business numbers and Telephone Preference Service registrations.
The length of phone calls for telephone surveys needs careful consideration – usually a 10 minutes maximum, but some interviews which gain high interest amongst participants, especially in the business.
You can monitor responses from the telephone surveys, including volume and answers to key questions, as they come in and are data entered. The feedback is quick with our up-to-date ‘top line’ reports providing ongoing analysis of the data.
There is also the opportunity to run a short pilot programme which then gives you the ability to refine script and/ or questionnaire in the light of the responses and interviewer feedback from the pilot, without delaying the project or affecting statistical reliability.