SurveyCTO CATI: How to Run Phone Surveys With the Same Precision as Face-to-Face Research

In-person surveys have one irreplaceable advantage: you can see who you are interviewing. You can verify that the person matches the target profile, observe their engagement, and build a level of rapport that online and phone methods struggle to match.

But in-person surveys also have real costs. Travel. Logistics. Time. Safety risks in some contexts. And when you need to survey 15,000 respondents across five regions in three months, you need something that scales.

SurveyCTO's Computer-Assisted Telephone Interviewing (CATI) features solve the scale problem without abandoning the rigor that field researchers depend on. Here is how the system works and what you need to know to run phone surveys well with it.

What CATI Actually Means

CATI stands for Computer-Assisted Telephone Interviewing. The interviewer (enumerator) communicates with the respondent via phone while entering data directly into a digital form on their device. Unlike reading from a paper script and recording answers separately, CATI integrates the call and the data entry into a single workflow — meaning fewer transcription errors, built-in skip logic, and automatic call logging all in the same system.

SurveyCTO has been a standard tool for face-to-face surveys in low-connectivity environments for years. Its CATI features, expanded significantly during the COVID-19 pandemic when in-person fieldwork became impossible, now allow those same rigorous data quality controls to apply to phone-based research.

How SurveyCTO CATI Works on Android

When SurveyCTO Collect is set as the default phone app on an Android device, it integrates with the device's calling functionality so that the enumerator can manage calls, fill in the survey form, and track call outcomes all in one place. Key features:

• In-app call management: enumerators can launch calls directly from the survey form using the phone-call field plug-in. They do not need to switch apps or manually dial numbers.
• phone-call-duration() function: records the exact duration of each call within the form. This is one of the most powerful quality control tools available, since a 25-minute interview should not have a call duration of 4 minutes.
• phone-call-log(): captures a log of all calls made during a session, including timestamps, call attempts, and call status (connected, dropped, busy, no answer).
• collect-is-phone-app() function: checks whether SurveyCTO Collect was actually used as the phone app during the interview — not just that the form was filled in while a call was supposedly in progress.
• Number hiding: for privacy-sensitive projects, the respondent's actual phone number can be hidden from the enumerator using the hide_phone_number option. The enumerator calls through the app without seeing the number.

A call log that shows a 3-minute conversation for a 40-question survey is a quality red flag. SurveyCTO CATI gives supervisors the data to catch it automatically.

Setting Up a CATI Project: The Key Steps

1. Configure SurveyCTO Collect as Default Phone App

In the Collect Admin Settings, set the phone app behavior. Options include: on-demand (enumerator switches to Collect when needed), always (Collect is always the default phone app), or whenever running a form. For quality control purposes, always is the most robust setting for dedicated CATI devices. For personal devices used by enumerators for both work and personal calls, on-demand is more practical.

2. Use Case Management for Respondent Assignment

SurveyCTO's case management feature is what makes CATI at scale manageable. Instead of distributing lists of phone numbers manually, case management automatically assigns respondents to enumerators, tracks contact attempts, and removes a respondent from the active pool once the required number of contact attempts has been made or a completed interview has been recorded.

The pulldata() function pulls each respondent's name, phone number, and other pre-loaded attributes directly into the survey form when the interviewer accesses that case — no searching, no manual lookup.

3. Build Call Status Tracking Into Your Form

Every CATI survey form should include a call disposition question at the start: what is the outcome of this call? Completed interview, not available, call back scheduled, refusal, wrong number, disconnected. These outcomes feed into your case management dashboard and give supervisors real-time visibility into fieldwork progress.

4. Monitor Data Quality in Real Time

Publish your data to Google Sheets, Power BI, or another visualization tool to build a monitoring dashboard. Key indicators to track daily: average call duration per enumerator (flag those consistently below the expected minimum), call attempt to completion ratio, number of callbacks scheduled versus completed, and geographic distribution of completed interviews.

When CATI Is the Right Choice

• Your target population is geographically dispersed and in-person fieldwork is not cost-effective.
• The research topic is sensitive and some respondents may be more forthcoming over the phone than face-to-face.
• You need speed: CATI surveys can be deployed faster than face-to-face ones once the system is configured.
• You are conducting a follow-up survey of a previously interviewed panel, where recontact via phone is the practical approach.

CATI Limitations to Design Around

• Respondents must own and answer a phone. In low mobile penetration environments, this introduces sampling bias.
• Complex questions with long response lists are harder to administer over the phone than face-to-face. Keep the survey instrument leaner for CATI than you would for CAPI.
• Identity verification is harder. You cannot confirm who has answered unless you have a back-check protocol built in.

Sources: SurveyCTO CATI Documentation (docs.surveycto.com); SurveyCTO Phone Survey Quality Control Guide; SurveyCTO CATI Starter Kit; Outline India CATI Case Study (surveycto.com)