Customer Discovery Interview Question Script & Bias Eliminator

Craft unbiased user research interview scripts based on "The Mom Test" principles to uncover true customer willingness-to-pay without false positives.

Curated by Sarah Jenkins
Updated: Aug 12, 2026
Run Time: 2 mins
Verified: ChatGPT, Claude, Gemini
Customer Discovery Interview Question Script & Bias Eliminator
Visual System Workflow & Architecture ReferenceVerified Blueprint Asset

Architecture & Behavioral Blueprint

This prompt implements an end-to-end framework specifically designed for Product Discovery, Startups & Market Validation. It enforces role authority, step-by-step structural reasoning, and negative constraints to prevent generic, repetitive AI filler.

Target Use CaseProduct Discovery, Startups & Market Validation
Engine CompatibilityChatGPT • Claude • Gemini
Complexity LevelBEGINNER

The Complete AI Prompt

1-Click Clipboard Ready
System / Prompt Matrix
Act as a Product Discovery Coach and Lean Startup Specialist trained in Rob Fitzpatrick's "The Mom Test" principles. I am exploring a new product idea: Product Concept: [DESCRIBE PRODUCT CONCEPT IN 2-3 SENTENCES] Target Customer Persona: [e.g. Small business accountants using QuickBooks] Core Assumption to Validate: [e.g. They spend > 5 hours a week manually chasing missing client receipts and would pay $50/mo to automate it] Construct an unbiased Customer Discovery Interview Script: 1. THE GOLDEN RULES OF THE INTERVIEW: - 3 strict rules on what words to NEVER say (e.g., "Would you buy a product that...", "Do you think it's a good idea if..."). 2. WARM-UP & CONTEXT GATHERING (5 mins): - 3 neutral open-ended questions about how they currently spend their workday. 3. PAST BEHAVIOR & PAIN DIGGING (15 mins): - 4 specific questions investigating the LAST TIME they experienced this problem: ↳ "When was the last time X happened?" ↳ "Walk me through what you did step by step." ↳ "What other tools or workarounds have you tried?" ↳ "How much did that workaround cost you in time or money?" 4. WILLINGNESS-TO-PAY & COMMITMENT TEST: - 2 non-leading commitment tests to see if the customer will invest real currency, time, or reputation right now. 5. POST-INTERVIEW SCORING SCORECARD: - 4 criteria to score whether the interviewee is a genuine early adopter or just being polite.
228 words
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Execution Protocol (Step-by-Step)

01

Define your riskiest assumption

State what must be true for your product idea to succeed.

02

Conduct 5-10 customer calls

Never pitch your solution during discovery; listen exclusively to past behaviors.

Verified Output Walkthrough

Sample Input Arguments

Idea: AI software that automatically generates tax deduction spreadsheets from bank receipts.

Verified Benchmark Response
### Past Behavior Questions: - "When was the last time you prepared quarterly deductions?" - "What specific software or spreadsheet tabs were open on your screen?" - "How much did you spend on accounting software last year?"
Growfyx Engineering Notes
  • If the customer has not spent money or significant time trying to solve the problem in the last 6 months, the pain is not severe enough to monetize.
Editor Recommendation4.9/5 Rating

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Frequently Asked Questions

Why avoid asking "Would you buy this?"

People will always say yes to be polite when it costs them nothing, creating dangerous false positive validation.