What We Cover in This Episode
Why product teams are drowning in data — but still making uninformed decisionsThe danger of projecting your own expertise onto low-quality signalsTeresa's "ladder of evidence" framework: as effort goes up, so does valueHenrik Kniberg's triangle (Petra's coaching go-to): quantitative data + organizational signal + qualitative insightWhat Teresa is learning from real interview transcripts at Vistaly — and why many "interviews" aren't really interviewsThe spectrum of interview quality: story-based interviews vs. direct-question interviews vs. usability preference gatheringWhy product demos and stakeholder meetings are being mistaken for customer researchHow to communicate signal strength without discouraging teams from interviewingThe strategic product decision behind Vistaly's choice to support imperfect interview formats — and use them as coaching momentsWhy vibe-coded software makes good interviewing skills more critical than everKey Concepts & Frameworks
Ladder of Evidence — Teresa's framework for thinking about evidence quality. Low-effort signals (support tickets, app store reviews, sales call notes) are abundant but carry weak signal strength. High-effort, story-based interviews are harder to collect but carry far more context for decision-making.Story-Based Interviewing — Rather than asking customers about preferences or opinions, story-based interviews collect the narrative of a specific experience: what were you trying to do, when did this come up, what went wrong, what did you need? This context is what makes evidence actionable.Signal vs. Insight — Low-quality signals tell you something is worth exploring. They rarely tell you what to build. The risk: product experts fill in the gaps with their own assumptions and get it wrong."We're inundated with these low-value signals all the time, but they rarely carry enough signal strength to actually tell us what we should be building. But they feel like they do." — Teresa Torres
"The worst thing you could do is never talk to a customer. The best thing you can do is collect a really rich story about their experience." — Teresa Torres
"It is easier than ever to release mediocre software. People need to get better at interviewing." — Petra Wille
Follow Teresa Torres: https://ProductTalk.org Follow Petra Wille: https://Petra-Wille.comMentioned in this episode:
Teresa’s blog:
Ask Teresa: What Should You Do With Insights That Don’t Come from Customer Interviews?
Story-Based Customer Interviews Unlock Missing Context
The Ladder of Evidence: Get More Value From Your Customer Interviews and Product Experiments
Learn more about story-based customer interviews in Teresa’s course: Story-Based Customer InterviewsHenrik Kniberg's Triangle — a framework Petra uses in coaching to ensure teams triangulate quantitative data, organizational signal, and qualitative evidence before acting
Minimise the Gap Between Maker and User by Henrik Kniberg
Vistaly — Teresa's partnership for AI-generated interview snapshots and opportunity solution trees