Face-to-face Survey — Interviewer-Administered Questionnaire
Face-to-face Survey (Interviewer-Administered Questionnaire) · Also known as: personal interview survey, in-person survey, PAPI survey, door-to-door survey
A face-to-face survey is a structured data collection method in which a trained interviewer meets respondents in person and administers a standardised questionnaire. The interviewer reads questions aloud, clarifies wording when permitted by protocol, and records answers — either on paper (PAPI) or a laptop/tablet (CAPI). This mode consistently achieves higher response rates and better data quality for complex or sensitive questionnaires than self-administered alternatives, and is the reference standard in large-scale population surveys.
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When to use it
Use a face-to-face survey when the target population has low literacy or limited technology access, when the questionnaire is long or cognitively demanding, when complex visual stimuli (show-cards, images, product samples) are needed, or when the research setting makes self-administration impractical (e.g., remote rural areas, household expenditure studies, health surveys). It is the preferred mode when response rates are critical and the research budget can support field operations. Avoid it when the budget is limited (it is the most expensive survey mode), when the topic is highly sensitive and anonymity is paramount (self-administered modes reduce social-desirability bias), or when a rapid turnaround is needed that field logistics cannot accommodate.
Strengths & limitations
- Highest response rates of any survey mode — interviewer presence and rapport markedly reduce refusals.
- Enables complex questionnaire designs: show-cards, physical stimuli, long batteries, and elaborate skip patterns.
- Reduces item non-response because interviewers can prompt for a response without departing from protocol.
- Reaches populations underserved by digital or mail modes — elderly, low-literacy, or rural respondents.
- Real-time data quality control is possible with CAPI: range checks and skip-logic enforcement during the interview.
- The most expensive survey mode per completed interview, owing to interviewer salaries, training, travel, and supervision costs.
- Interviewer effects — slight variations in vocal tone, appearance, or probing behaviour can introduce systematic bias across interviewers.
- Social-desirability bias is elevated; respondents may give socially acceptable answers in the presence of an interviewer, particularly on sensitive topics.
- Logistically complex to coordinate at scale: scheduling, geographic dispersion, and back-check procedures add project management burden.
- Slower than online or telephone modes for data collection and entry, which limits feasibility for time-sensitive research.
Frequently asked
What is the difference between PAPI and CAPI face-to-face surveys?
PAPI (Paper-and-Pencil Interviewing) means the interviewer records answers on a printed form; CAPI (Computer-Assisted Personal Interviewing) means answers are entered directly into a laptop or tablet during the interview. CAPI enforces skip logic automatically, flags out-of-range responses in real time, and transmits data electronically — reducing transcription errors and speeding up data delivery. PAPI is cheaper when technology is unavailable or unreliable in the field.
How do face-to-face surveys compare with online surveys for response rates?
Face-to-face surveys consistently achieve higher response rates — often 70–90% in well-designed studies — compared with typical online survey rates of 10–40%. The interviewer's physical presence and social interaction reduce refusals. However, the coverage advantage depends on the target population: for digitally connected populations, online surveys can reach comparable response rates at far lower cost.
How should I account for the complex sample design when analysing face-to-face survey data?
You must specify the full design — stratification variables, cluster identifiers, and sampling weights — to your statistical software before running any analysis. Using ordinary regression or chi-square tests on weighted data without accounting for clustering underestimates standard errors. Software routines such as Stata's svy prefix, R's survey package, or SPSS Complex Samples handle design-corrected estimation correctly.
When is a face-to-face survey not the right choice?
Avoid face-to-face surveys when the budget is tight, the questionnaire is short and non-complex, the population is digitally accessible, the topic is highly sensitive and anonymity is critical (self-administered ACASI or online modes reduce interviewer presence effects), or when rapid turnaround is required that field logistics cannot meet.
How many interviewers do I need, and how do I control interviewer effects?
The number of interviewers depends on fieldwork duration, geographic spread, and target interview count. To control interviewer effects: standardise training and monitor protocol fidelity, randomly assign interviewers to respondents where possible, include interviewer ID as a random effect in multi-level models, and conduct back-checks on at least 10% of completed interviews to detect fabrication or deviation.
Sources
- Fowler, F. J. (2014). Survey Research Methods (5th ed.). Sage Publications. ISBN: 978-1452259000
- 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
How to cite this page
ScholarGate. (2026, June 3). Face-to-face Survey (Interviewer-Administered Questionnaire). ScholarGate. https://scholargate.app/en/survey-methodology/face-to-face-survey
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
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