10. • Always qualify the person you’re talking to and make sure it
fits your customer hypothesis
• The best question to start is always, “Tell me the story of the
time you did…”
• Never ask a question that starts with the word “would,” ie.
“Would you do X?” or
• “Would you pay for this?” These are hypothetical questions
that produce inaccurate data
• Avoid Confirmation Bias by asking your team, “Could anyone
disagree with this question?” The answer must always be yes.
• Avoid Observer Bias by with-holding the facts of what you’re
testing or building (otherwise customers will reverse engineer
the questions).
• Even better is if customers don’t even know it’s an interview.
7 Bonus Tips for Customer Development
Interviews