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Comparison

Qualitative vs quantitative customer research

What each kind of research answers, the methods it uses and when to reach for it

Comparison of quantitative research, which answers what and how many, and qualitative research, which answers why, with methods for each
Use qualitative research to find and understand a problem, then quantitative research to measure it at scale.

A side-by-side comparison of quantitative and qualitative customer research for product teams. Quantitative work such as closed-ended surveys, analytics and A/B tests tells you what is happening and how often. Qualitative work such as interviews and diary studies tells you why. Most projects need both: explore with conversations first, then validate with numbers. Koji runs AI-moderated interviews so the qualitative half can reach hundreds of customers.

Where this appears

What's in this comparison

Quantitative research

  • Answers what and how many
  • Closed-ended surveys, analytics, A/B tests and NPS
  • Gives statistical confidence to validate a finding
  • Best for measuring, comparing and tracking over time

Qualitative research

  • Answers why people behave the way they do
  • Interviews, focus groups, diary studies, contextual inquiry
  • Finds the unexpected and the context behind behaviour
  • Best for discovery and exploring new problems

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<p>Source: <a href="https://www.koji.so/visuals/qualitative-vs-quantitative-customer-research">Qualitative vs quantitative customer research</a>, Koji</p>