The Full-Stack Researcher
Guides, Case Studies, & Actionable Advice for Mixed-Methods User Research
Conjoint analysis for individual preference matching (5 business examples)
Individual-level conjoint analysis scores what one person values. 5 uses, from enterprise demos to matchmaking, and how to set it up so the scores hold up.
Rejection rate in conjoint analysis: how to tell a dealbreaker from a close call
Rejection rate in conjoint analysis shows which options make people pick None, and how to tell a dealbreaker from a close call before you set a price.
Should AI design your conjoint study? (What the published research shows)
AI conjoint analysis can draft attributes and levels from your interviews, but synthetic respondents got fluoride 3x too high and segments wrong.
How to measure price sensitivity: 6 ways from 3 pricing surveys
Measure price sensitivity 6 ways from 3 pricing surveys: Van Westendorp, Gabor Granger and conjoint, with real data and elasticity maths.
Free Van Westendorp Google Sheets template (no sign-up)
Get a free Van Westendorp Google Sheets template that calculates the four lines, finds the optimal price and acceptable range, and draws the chart.
The Newton-Miller-Smith extension explained (with a worked example)
The Newton-Miller-Smith extension adds two purchase-intent questions to Van Westendorp. How it estimates demand and revenue, with a worked example.
Van Westendorp for Pricing Research (Survey Guide)
Van Westendorp pricing finds your optimal price from four simple questions, the same method OpenAI used to set ChatGPT's $20 plan. Here's how it works.
Van Westendorp survey tools: 6 platforms compared (2026)
Van Westendorp survey tools compared: OpinionX, Conjointly, SurveyMonkey, Qualtrics, QuestionPro and SurveyKing on features and billing model.
How to segment Van Westendorp results (with a worked example)
See how Van Westendorp segmentation shows which prices each customer group accepts, using real survey data, and how to turn that into tiered pricing.
The history of the Van Westendorp method (1976 to today)
Read the Van Westendorp history, from the 1976 ESOMAR paper in Venice to the Newton-Miller-Smith extension, and why the method is still used.
Van Westendorp vs Conjoint Analysis: when a price range is enough (and when it isn't)
Van Westendorp vs conjoint analysis: when a price range is enough, when you need feature prices, and what each costs in time and participants.
How to read a Van Westendorp chart (with a worked example)
Van Westendorp analysis: what each of the four lines means, how to find the optimal price and acceptable range, and the misreadings to avoid.
Van Westendorp vs Gabor Granger: which pricing survey do you need?
Van Westendorp vs Gabor Granger: one measures how prices feel, the other who would buy. Both run on the same product, plus when to use each.
Van Westendorp sample size calculator (free, no sign-up)
Work out your Van Westendorp sample size with a free calculator, and see the reasoning behind the number from resampling a real pricing survey.
Product concept testing: 4 studies to run before you build (in order)
Product concept testing in 4 studies: find what matters, test your USP with conjoint, price it with Van Westendorp, then test real purchases.
Screener questions: why hiding the target beats adding more (with evidence)
Screener questions that reveal the qualifying answer invite lies: 83% in one study. How to hide the target, and how screening out works on OpinionX.
Van Westendorp and Gabor Granger in one survey (how to build it and read it)
How to run Van Westendorp and Gabor Granger in one survey: what each adds, which goes first, the build steps, and how to combine them into one price.
Gabor Granger tools: 6 platforms compared
Gabor Granger tools compared on what changes your data: how the next price is picked, random first prices, prescreeners, segments and billing.
How a Gabor Granger survey picks the next price (sequential, random or binary search)
Gabor Granger price search compared: sequential, random and binary search, how many questions each takes, and why the first price matters.
Gabor Granger sample size calculator (how many people you need, and why)
A free Gabor Granger sample size calculator, plus the reasoning: 100 people for a direction, 300 for a confident price, 100 per segment.