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Do you need support in running a pricing or product study? We can help you with agile consumer research and conjoint analysis.

Looking for an online survey platform?

Conjointly offers a great survey tool with multiple question types, randomisation blocks, and multilingual support. The Basic tier is always free.

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What is goodness of fit?

Goodness of fit assesses how well your survey report describes the respondents’ answers. Our platform uses McFadden’s pseudo-R² to calculate goodness of fit; if the information used to calculate your survey report could be predicted to 100% accuracy, then the pseudo-R² would be 100%.

  • Strong goodness of fit (pseudo-R² value of over 65%) indicates that respondents have clear preferences for features
  • Weak goodness of fit (pseudo-R² value of under 45%) suggests that respondents choices are more arbitrary.
A survey report with a pseudo-R² value of 80%, indicating strong goodness of fit.