How many qualitative interviews is 'enough'?

Pattern saturation typically occurs around 12-25 interviews for focused topics. Below 12, you're working with anecdotes; above 25, marginal value diminishes unless segmentation matters.

Can AI replace qualitative interviewing?

Not the candid-conversation part. AI tools accelerate transcription, summarisation and thematic analysis; the interview itself remains a human practice for the foreseeable future.

Is qualitative research less rigorous than quantitative?

Different rigour, not lesser. Qualitative rigour is sampling discipline, interviewer skill, interpretation transparency. Quantitative rigour is statistical methodology and sample size.

Qualitative Research

Qualitative research is primary-research methodology that emphasises depth, meaning and context — typically through 1:1 interviews, focus groups, ethnographic observation and content analysis. Contrasted with quantitative research, which emphasises measurement and statistical reliability.

Term: Qualitative Research
Section: Glossary
Last refreshed: Q1 2026

01/In Depth3–5 paragraphs

Qualitative work answers 'why and how' questions. Quantitative work answers 'how many and how much' questions. Most strategic decisions need both; the practical question is the right mix.

Expert-network work is overwhelmingly qualitative: 1:1 expert calls, customer interviews, panel discussions. Quantitative work (expert surveys, B2B research panels) is a smaller adjacent market typically served by survey-specialist providers.

Common failure modes: treating individual qualitative findings as representative of populations; under-investing in sample size for qualitative pattern recognition (15 interviews surfaces more reliable patterns than 5); failing to triangulate qualitative findings against quantitative or secondary signals.

Quality of qualitative research depends heavily on interviewer skill. Structured guides, behavioural questioning techniques and probing skill all materially affect the quality of insight extracted from any individual conversation.

02/Examples4 concrete cases

+12 in-depth interviews with operators in a category to surface emerging themes
+Focus group with 8 senior buyers discussing reactions to new positioning
+Ethnographic observation of buyers using a competitor product in their workflow
+Content analysis of 50 buyer-side documents to surface decision-criteria patterns

03/Frequently Asked3 questions

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04/See AlsoWhere this applies

04.1

EXPERT CONSULTATIONS

One-hour calls with vetted operators, executives and specialists across 50,000+ professionals. Scheduled in 3 to 5 business days. From €500.

04.2

CUSTOMER RESEARCH

Programmatic and ad-hoc customer interviews across B2B and B2C verticals.

05/Related Terms3 suggestions

QUANTITATIVE RESEARCH

Quantitative research is primary-research methodology that emphasises measurement and statistical reliability — typic…

PRIMARY RESEARCH

Primary research is original data collected directly from sources — operators, customers, channel partners, ex-employ…

VOC

Voice of Customer (VoC) is a structured, recurring primary-research programme with a company's current customer base,…

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