Face-to-face Structured Interview
Also known as: FTFSI, personal interview, in-person structured interview, face-to-face survey interview
A face-to-face structured interview is a data collection method in which a trained interviewer meets each respondent in person and asks a fixed set of questions in a predetermined order, recording responses verbatim or using a closed-response format. It combines the response-rate advantages of personal contact with the standardization of a fixed instrument, making it a cornerstone of large-scale social, health, and policy surveys.
Key highlights
- Achieves higher response rates than mail, telephone, or online modes, especially for hard-to-reach populations.
- Allows use of show cards, physical props, and complex routing logic that self-completion formats cannot support.
- Interviewer presence enables clarification of instructions and reduces item non-response.
- Suitable for populations with low literacy, limited internet access, or unfamiliarity with survey formats.
- Direct observation of the interview setting can provide supplementary contextual data.
Intuition
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How it works
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When to use it
Use a face-to-face structured interview when: (1) the target population has low literacy or limited access to phones and internet; (2) the questionnaire requires show cards, physical stimuli, or complex skip patterns that self-administered formats cannot handle; (3) high response rates are essential and the budget permits field operations; or (4) the research context involves sensitive topics where in-person rapport improves response quality. Do NOT use it when: budget and timeline preclude field operations (telephone or online surveys are cheaper and faster); the sample is geographically dispersed across multiple countries without field offices; the topic is so sensitive that anonymity — better guaranteed by self-completion — outweighs the benefits of personal contact; or a flexible, exploratory conversation is needed (use a semi-structured or in-depth interview instead).
Strengths & limitations
- Achieves higher response rates than mail, telephone, or online modes, especially for hard-to-reach populations.
- Allows use of show cards, physical props, and complex routing logic that self-completion formats cannot support.
- Interviewer presence enables clarification of instructions and reduces item non-response.
- Suitable for populations with low literacy, limited internet access, or unfamiliarity with survey formats.
- Direct observation of the interview setting can provide supplementary contextual data.
- Substantially more expensive than telephone or online modes due to travel, interviewer salaries, and supervision.
- Interviewer effects — inadvertent cues from tone, appearance, or behaviour — can bias responses, particularly on sensitive or socially desirable topics.
- Geographically dispersed samples require large interviewer networks or significant travel costs.
- Slower data collection compared to online surveys; unsuitable for very tight timelines.
Common pitfalls
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Applications
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Frequently asked
What distinguishes a face-to-face structured interview from a semi-structured interview?
In a structured interview every question and its wording are fixed in advance, responses are typically pre-coded, and the interviewer has no discretion to probe beyond specified neutral follow-ups. In a semi-structured interview the interviewer uses a topic guide with open-ended questions and can follow threads of interest, making it more exploratory and qualitative. The face-to-face structured interview prioritizes comparability across respondents; the semi-structured interview prioritizes depth.
What is CAPI and should I use it?
Computer-Assisted Personal Interviewing (CAPI) means the interviewer reads questions from a tablet or laptop and enters responses directly. CAPI enforces skip logic automatically, flags out-of-range entries, and timestamps the interview. For studies with complex routing or large sample sizes, CAPI substantially reduces recording errors and speeds up data preparation. Paper-based forms remain appropriate for settings with unreliable power supply or where respondents are uncomfortable with devices.
How large does my sample need to be?
Sample size depends on the precision required for your key estimates, the design effect of any clustering or stratification, and the expected non-response rate. For a simple random sample aiming at a 95% confidence interval of ±3 percentage points for a proportion near 50%, approximately 1,000 completed interviews are needed. Clustered household designs typically require larger samples (design effect 1.5–2.5) to achieve equivalent precision. A power calculation or sample size formula should be run before fieldwork.
How do I reduce interviewer effects?
Key measures include: standardized verbatim question reading; training interviewers to use only neutral, pre-approved probes ('Could you tell me more?'); random assignment of interviewers to respondents; ongoing monitoring of inter-interviewer variance on key variables; and using self-completion inserts (paper or tablet ACASI) for the most sensitive questions in the instrument.
Can I combine face-to-face structured interviewing with qualitative follow-up?
Yes — this is a common mixed-methods design. The structured component yields quantitative data for population-level inference; a purposive sub-sample of respondents is then invited for a qualitative in-depth or semi-structured interview to explore mechanisms or context. The structured interview responses can guide the selection of informative sub-cases for the qualitative phase.
Sources
- 1.Groves, R. M., Fowler, F. J., Couper, M. P., Lepkowski, J. M., Singer, E., & Tourangeau, R. (2009). Survey Methodology (2nd ed.). Wiley.ISBN 978-0470465462
- 2.Fowler, F. J. (2009). Survey Research Methods (4th ed.). Sage.ISBN 978-1412958417
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Cite this page
ScholarGate. (2026, June 3). Face-to-face structured interview. ScholarGate. https://scholargate.app/survey-methodology/face-to-face-structured-interview