What is CATI, and when should trade research use it?

Online surveys are fast, scalable and often less expensive than telephone research. But when you are researching installers, painters and other construction professionals, speed and sample size are not enough. The real question is whether you are speaking to the right people.

At USP Marketing Consultancy, our position is clear: for representative B2B research among trades such as installers and painters, CATI is generally our preferred approach. Online research can still be valuable for exploratory studies, concept testing and surveys using verified customer lists. But if the findings will influence brand strategy, product development or market investment, the sample needs to provide a credible picture of the market.

What is CATI?

CATI stands for Computer-Assisted Telephone Interviewing. A trained interviewer conducts the interview by telephone using a structured, digitally programmed questionnaire.

However, CATI is only an interview mode. Calling someone does not automatically make that person representative of the market. The sample source, recruitment process and screening criteria remain critical.

The same applies to online research, often referred to as CAWI. A large online sample can look impressive, but it is only valuable if the respondents genuinely reflect the trade audience you want to understand.

What our own comparison showed

The representativeness risk of online trade panels is not theoretical. In our Painter Insight Monitor, we compared a CATI sample with an online sample and found that they reached materially different types of professionals.

In the online sample, 67% of respondents worked at painting companies with more than nine employees, compared with 27% in the CATI sample. Online respondents were also considerably less focused on painting as their professional activity.

These differences affected commercially important outcomes, including brand awareness, brand usage and most-used brand. Weighting the results did not resolve most of the differences.

This matters because company size and professional specialisation can influence brand familiarity, purchasing processes and product choice. If larger or less specialised companies are overrepresented, the research may not simply provide different answers. It may be describing a different part of the market.

The most common mistake: choosing the method first

Clients regularly start with a methodological decision: “We want an online survey” or “We need 300 telephone interviews.”

That is the wrong starting point.

First define exactly whom you need to understand, what qualifies someone to participate, where the sample will come from and what decisions the findings must support. Only then should you choose CATI, online research or a combination of the two.

“Installers”, for example, is usually too broad a definition. Do you need professionals who install the relevant product every week, people who purchase it, company owners or installers who influence the choice of brand? They may all describe themselves as installers, but they cannot necessarily answer the same commercial questions.

Why CATI often works better for trade research

CATI gives researchers greater control over respondent verification. An interviewer can establish which products someone installs, how frequently they work with the category and whether they buy, specify or simply use the product selected by someone else.

This is particularly useful in construction and installation markets, where job titles do not always reflect a professional’s actual activities or decision-making authority. Interviewers can clarify inconsistent answers, explain technical terminology and ask structured follow-up questions when an initial answer is too general.

CATI can also provide better access to professionals who are poorly represented in available online panels. The question is not whether tradespeople use the internet. They obviously do. The question is whether a particular online source offers credible coverage of the professional population you need to study.

When online research is suitable

Online research remains a strong option when the source and purpose fit the business question.

It can work particularly well for exploratory research, where the objective is to identify themes rather than produce a representative market measurement. It is also useful when respondents need to review products, packaging, propositions, technical drawings or other visual materials.

Online surveys can also be effective when a company has a verified customer database. In that case, respondent eligibility is established through the relationship with the company rather than assumed from a general panel profile. The limitation is that a customer database represents your customers or contacts, not necessarily the wider market.

When CATI and online should work together

Sometimes the strongest design combines both methods.

For example, USP could use CATI to recruit and verify installers, establish their professional experience and collect the core market measures. Those respondents could then move to an online environment to compare visual concepts, packaging or technical information.

Different audiences may also require different methods. Installers might need telephone recruitment, while architects or verified customers may be accessible through a reliable online source.

Mixed-mode research should not, however, mean collecting interviews from different sources and simply merging the results. Researchers need to consider whether the sources reach comparable professionals and whether the interview mode itself affects the answers.

What should you ask a research agency?

Before approving a CATI or online study, ask:

• Where will respondents come from?
• How will their professional eligibility be verified?
• Does the source credibly cover the target market?
• Which parts of the market might be overrepresented or missed?
• What conclusions can we safely draw from the results?

If the agency cannot answer those questions clearly, a bigger sample will not solve the problem.

Our recommendation

If your objective is representative measurement among contractors, installers, painters or similar professional trades, USP generally recommends CATI. It offers greater control over screening and reduces the risk of drawing market-wide conclusions from an unbalanced online panel.

For exploratory research, visual concept testing or surveys using a verified customer list, online research may be entirely appropriate. A carefully designed mixed approach can also be effective when recruitment and questionnaire requirements differ.

Because a fast survey among the wrong respondents is not efficient research. It is an efficient way to become confident in the wrong answer.

Planning research among installers or other trade professionals?

Before investing in fieldwork, discuss your target population, sample source and methodology with a USP research consultant. We will help you determine whether CATI, online or a mixed design provides the most reliable basis for your decision.

Book a research scoping conversation with USP Marketing Consultancy and make sure your research reaches the market you actually want to understand.