Telephone-assisted Survey — CATI Survey
Also known as: CATI survey, computer-assisted telephone interview, telephone survey, phone survey
A telephone-assisted survey is a structured data-collection method in which a trained interviewer administers a standardised questionnaire to respondents over the telephone, often supported by Computer-Assisted Telephone Interviewing (CATI) software. It combines the efficiency of remote administration with the response-quality advantages of live interviewer guidance, making it widely used in social, public-health, market-research, and political polling contexts.
Key highlights
- Reaches geographically dispersed or mobile populations without the travel costs of face-to-face fieldwork.
- Live interviewer presence raises response rates and allows real-time clarification, reducing item non-response.
- CATI software automates skip logic, timestamps responses, and flags errors instantly, improving data quality.
- Faster fieldwork turnaround than postal surveys; results can be available within days for short instruments.
- Suitable for sensitive topics where anonymity over the phone is perceived as higher than in face-to-face settings.
Intuition
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How it works
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When to use it
Use a telephone-assisted survey when you need a cost-effective way to reach a geographically dispersed probability sample, when your questionnaire is short-to-medium in length (typically under 20 minutes), and when a live interviewer is needed to handle skip logic, clarify questions, or improve response rates among populations unlikely to complete self-administered surveys. It is particularly appropriate for population-health surveillance, political polling, customer satisfaction tracking, and rapid-turnaround policy research. Avoid it when the questionnaire requires visual stimuli, complex scales, or documents the respondent must consult; when the target population has very low telephone ownership or high caller-ID screening rates; or when interview length exceeds 25–30 minutes, as cooperation rates decline sharply for longer calls.
Strengths & limitations
- Reaches geographically dispersed or mobile populations without the travel costs of face-to-face fieldwork.
- Live interviewer presence raises response rates and allows real-time clarification, reducing item non-response.
- CATI software automates skip logic, timestamps responses, and flags errors instantly, improving data quality.
- Faster fieldwork turnaround than postal surveys; results can be available within days for short instruments.
- Suitable for sensitive topics where anonymity over the phone is perceived as higher than in face-to-face settings.
- Coverage bias: households without a landline or mobile phone, or with unlisted numbers, are systematically excluded from random-digit-dialling frames.
- Declining response rates in many countries due to increased caller-ID screening, call blocking, and general survey fatigue.
- Not suitable for surveys requiring visual aids, cards, photos, or physical materials.
- Interviewer effects — tone, accent, gender — can influence responses, requiring careful training and monitoring.
- Limited to populations literate enough to process spoken questions and willing to engage by phone.
Common pitfalls
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Applications
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Frequently asked
What is random-digit dialling (RDD) and why is it used?
RDD generates telephone numbers randomly within valid area-code and exchange combinations rather than drawing from a published registry. This ensures that unlisted numbers and newly assigned numbers have a chance of inclusion, producing a more representative frame of all telephone subscribers. The trade-off is a higher proportion of non-residential and disconnected numbers that must be screened out before the interview stage.
How does CATI differ from an ordinary phone interview with a paper questionnaire?
In a CATI system the questionnaire is displayed on the interviewer's screen and the software automatically routes through skip patterns, randomises response-option order where required, enforces range checks, and records answers directly to a database in real time. A paper-based telephone interview requires manual page turning, manual skip logic, and a separate data-entry stage — each introducing additional error. CATI substantially improves data quality and reduces the time from fieldwork to analysis.
What response rate is acceptable for a telephone survey?
There is no single threshold, but AAPOR (American Association for Public Opinion Research) guidelines require transparent reporting of response, cooperation, refusal, and contact rates using standardised formulas. In contemporary conditions, completion rates of 10–30% from RDD frames are common; what matters most is documenting and analysing non-response patterns and applying appropriate weighting, rather than achieving an arbitrary threshold.
When should I choose a telephone survey over an online survey?
Prefer a telephone survey when your target population has low internet access or digital literacy, when you need a probability sample without an existing panel, when the topic benefits from interviewer clarification, or when you need rapid turnaround without the time to recruit an online panel. Choose an online survey when questionnaire length exceeds 20 minutes, when visual stimuli or complex instruments are required, or when cost constraints make interviewer labour prohibitive.
How do I handle language barriers when administering telephone surveys to multilingual populations?
Best practice is to translate and back-translate the instrument, hire bilingual interviewers matched to the language preferences of sampled respondents, and offer a language-selection step at the start of the call. Multilingual CATI scripts can be programmed so the same skip logic and coding apply across language versions, allowing pooled analysis with a language-of-interview control variable.
Sources
- 1.Groves, R. M., & Kahn, R. L. (1979). Surveys by telephone: A national comparison with personal interviews. Academic Press.
- 2.Lavrakas, P. J. (1993). Telephone survey methods: Sampling, selection, and supervision (2nd ed.). Sage.ISBN 978-0803950795
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Cite this page
ScholarGate. (2026, June 3). Telephone-assisted Survey. ScholarGate. https://scholargate.app/survey-methodology/telephone-assisted-survey