Insight

Why Computer-Assisted Telephone Interviewing still matters

Online panels, AI agents and synthetic data have made research faster and cheaper. They have also made it harder to be sure that a real person gave the answer. A live telephone interview removes that doubt.

The trouble with the new voice of research

Speed and scale are real advantages, and nobody is suggesting the industry goes back to doing everything by phone. But the research literature is increasingly consistent about the cost.

Frontiers in Research Metrics and Analytics, 2024
Warns that AI-powered bots and sophisticated fraudsters threaten the integrity of studies that rely on online surveys, and that growing bot sophistication is undermining their reliability.
BMJ Open Quality, 2025
Describes how open, incentive-driven recruitment through social media has created ideal conditions for fraudulent and automated responses in online health surveys.
Proceedings of the National Academy of Sciences, 2025
Argues that survey research can no longer assume a coherent response is a human one.

Better fraud detection helps, but it is an arms race. Each new validation check is met by a more convincing bot.

Real conversations, verifiable people

A telephone interviewer knows they are speaking to a person, and can confirm it is the right person. They can hear hesitation, probe a vague answer and capture a verbatim in the respondent's own words. That is depth, clarity and certainty that no click-through survey can match.

Re-centring research on real conversations is how the industry rebuilds trust in its data. CATI is the organic voice of research: validated, human responses that complement the digital methods rather than compete with them.

Mixed mode: the best of both

Mixed-mode research is now a mainstream standard. Ipsos has observed that it is becoming commonplace as new technology makes participation easier, letting people respond through the mode that suits them, with better coverage, better response rates and more efficient use of time and budget. Research specialists AMR and moweb make the point that blending telephone with online interviewing reduces error, and that the telephone interviewer is what guarantees the right person is answering. The Journal of Survey Statistics and Methodology notes that adoption has risen rapidly, driven by technology and by the COVID-19 pandemic.

In each case, telephone is the anchor. Online methods bring scale and convenience. CATI brings the assurance that the sample is real.

Making CATI pay

The case for telephone has never been about quality alone. It has to be affordable, and that is the dialler's job. Every minute an interviewer spends listening to ringing tones, busy signals and recorded messages is a minute you pay for and do not get back.

Predictive pacing
Calls placed slightly ahead of demand, so an interviewer is free the moment someone answers, while abandoned-call rates stay inside the limits your regulator sets. How pacing works
Answering machine detection
With FastAMD, recorded messages are screened out in about 0.4 seconds. Users have reported a third more talk time and a fifth more completes per interviewer hour. About AMD
Home working
A browser softphone means interviewers can work from anywhere with a headset and broadband, on the same campaign and supervision as your call centre. On site, at home, or both
Managed SIP
Local numbers in the markets you call, with one contract and one support team. About managed SIP

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