How to use the interview script builder
- Pick what the interview is for: finding the problem, learning why people signed up, onboarding, why they cancelled, or pricing.
- Say who you are talking to and the job or problem you are exploring.
- Choose a length, then copy or download the script and bring it to the call.
- Writing your own questions? Paste them into “Check my questions” to find the ones that invite guesses.
Ask about the past, not the future
People are kind, and bad at predicting their own behaviour. “Would you use an app that…?” gets a polite yes that means little. “Tell me about the last time you…” gets what actually happened: what they tried, what it cost them, what they pay for today. Rob Fitzpatrick’s book The Mom Test is built on this idea, and every question in these scripts follows it.
The checker flags five patterns that get unreliable answers:
- Hypotheticals (“would you…”, “imagine if…”)
- Predictions (“will you…”, “how much would you pay”)
- Leading questions (“don’t you think…”)
- Asking for opinions of your idea
- Yes-or-no questions, and two questions in one
It matches wording, not meaning, so treat a flag as a prompt to reread the question.
After the interviews
Write up each call the same day, with exact quotes. When patterns repeat across calls, test them at scale: the product-market fit survey once people use the product, or the price sensitivity meter for pricing. Our guide on validating a startup idea in a week puts interviews into a full plan.