Interviewing Users: How to Uncover Compelling Insights
Source: https://rosenfeldmedia.com/books/interviewing-users-second-edition/ ↗
If the rest of this collection is the argument, Portigal's handbook is the answer.
It teaches the actual craft of talking to real people: building rapport, asking open and non-leading questions, sitting in silence, following the participant instead of your script, and — the discipline underneath all of it — noticing what people do rather than only what they say.
The whole aim of the technique is to be surprised, to surface the workarounds and framings and needs your team could not have anticipated because they were never in anyone's head or corpus to begin with.
That is the precise antithesis of interviewing a synthetic user: Portigal's interview extends your knowledge beyond your assumptions exactly because the other person is not substitutable and can tell you something new.
It operationalizes Polanyi, Suchman, and Schön into a repeatable practice whose entire point is reaching what a model cannot contain.
Placed at the end of the itinerary, it is the constructive rebuttal — here is what fieldwork is, and here is the craft you would be throwing away.
Central argument
Portigal's book is a practical, opinionated field guide to user interviewing: planning and recruiting, building rapport, the discipline of asking open and non-leading questions, embracing silence, following the participant's lead, distinguishing what people say from what they do, and synthesizing raw sessions into insight. Its underlying stance is that interviewing is a real skill, routinely underestimated, and that its purpose is to be surprised — to surface needs, workarounds, and framings the team did not and could not have anticipated. It is craft knowledge about how to reach the unarticulated.
Critique
It is a practitioner handbook, not a theoretical work; readers looking for epistemology or evidence-of-efficacy will find heuristics and war stories instead. Some techniques are inevitably tied to a particular (largely North American, tech-industry) research culture, and interviewing has well-known limits — people confabulate, and self-report diverges from behavior, a gap Portigal acknowledges but that observation addresses better than any interview. The book's value is in transmitting a difficult tacit craft, not in proving its superiority.
Why it matters for product
This is the constructive close to the collection's argument: the concrete craft of extending knowledge beyond the corpus by engaging a real, non-substitutable person. For product leaders it operationalizes everything the theoretical works establish — Polanyi's tacit dimension, Suchman's situated action, Schön's reflection-in-action — into a repeatable practice whose entire aim is to be told something you did not already know. Against the ceremony of the synthetic interview, Portigal describes the real thing and why it cannot be faked by a mirror.