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In-Depth Interview (IDI) Guide Builder

Build a one-on-one interview guide for deep individual perspectives.

What is the In-Depth Interview (IDI) Guide Builder?

The In-Depth Interview (IDI) Guide Builder is a free AI skill that writes a one-on-one interview guide for qualitative food and beverage research. You give it the research objective, the topic, and who you're interviewing; it returns a rapport-building opener, a laddering question structure that moves from concrete behavior to underlying motivation, probes for going deeper on any answer, techniques suited to sensitive or high-involvement topics, and interviewer notes on when to stay silent and let the respondent fill the space. It is built for insights managers and researchers who need one person's honest, undiluted view, not a group's negotiated consensus. Because IDIs run one respondent at a time, the guide is built for depth over breadth: fewer questions, asked more ways, until the real motivation surfaces. Cross-checking the topic framing against live food and beverage demand data helps confirm the individual perspective you're hearing reflects a broader pattern, not a single outlier voice.

Who it's for

  • Insights managers planning individual depth interviews
  • Consumer research leads studying sensitive or high-involvement topics
  • UX and product researchers interviewing consumers one-on-one
  • Founders conducting their own early customer interviews

What you get

  • A rapport-building opener suited to a one-on-one setting
  • A laddering question structure from behavior to motivation
  • Follow-up probes for going deeper on any single answer
  • Techniques for sensitive or emotionally loaded topics
  • Interviewer notes on silence, pacing, and follow-up timing
  • A closing sequence that captures unprompted final thoughts

How to use it

  1. 1Paste the prompt into ChatGPT, Claude or Gemini.
  2. 2Fill in the brackets (objective, topic, respondent profile, interview length).
  3. 3Answer its clarifying questions about sensitivity and depth needed.
  4. 4Ask it to adapt the guide for a phone or video interview if it wasn't written for one.

See it in action

Example input

Objective: understand why some subscribers stopped fictional 'Hollyfare Kitchen' meal-kit subscriptions after 2-3 boxes. Respondents: 10 lapsed subscribers, one-on-one 45-minute video interviews. This is a sensitive topic since some respondents may have cancelled due to cost concerns or feeling judged about not cooking from scratch.

Example output

In-depth interview guide — Hollyfare Kitchen lapsed subscribers (45 minutes, one-on-one video)

0:00-0:05 — Warm-up and consent
Thank the respondent, confirm recording consent, and open with a low-stakes question unrelated to the sensitive topic: "Tell me a bit about a typical weeknight dinner at your place these days." This establishes a natural, conversational tone before any questions about cancellation, and gives you a baseline read on their cooking routine to reference later.

0:05-0:12 — Behavior first: the subscription story
"Walk me through how you first heard about Hollyfare Kitchen and what made you sign up." Let them tell the story in their own order; do not interrupt to redirect to your question list. Follow with: "Take me through your first box — what happened when it arrived?"
Probe: "What did a typical week look like once you had a few boxes in?"

0:12-0:22 — Laddering toward the cancellation motivation
Start concrete, then ladder upward: "Tell me about the week you decided to cancel — what happened?" (concrete event) then "What was going through your mind at that point?" (immediate reaction) then "What did that moment say to you about whether Hollyfare Kitchen was working for you?" (underlying belief).
This is the core laddering sequence — do not skip from the concrete event straight to "why did you cancel," which invites a rehearsed, surface-level answer instead of the real reasoning.

0:22-0:30 — Sensitive-topic technique: normalizing and indirection
Because cost and "not cooking from scratch enough" can carry judgment, avoid asking "was it too expensive?" or "did you feel guilty?" directly. Instead: "A lot of people we talk to mention a few different reasons for pausing a meal kit — juggling cost, time, or just how the boxes fit their week. What was going on for you?" This normalizes multiple reasons before the respondent has to name their own, lowering the social-desirability pressure to give a flattering answer.
If cost comes up: "How did you think about the value of a box versus what else that money could go toward?" — indirect enough to avoid feeling like an interrogation about money.
Sit in silence for at least 3-5 seconds after each answer before your next question — the most candid detail often comes in what the respondent adds after an initial answer, once the silence gets uncomfortable enough that they keep talking.

0:30-0:38 — What would have changed the outcome
"Was there a point where something could have changed your mind about continuing?" Probe for specificity: a price point, a different box frequency, a specific dish.
"If a friend asked you about Hollyfare Kitchen today, what would you tell them?"

0:38-0:43 — Closing and unprompted thoughts
"Is there anything about your experience we haven't talked about that you think is important?" This closing question regularly surfaces the single most important theme of the whole interview — never skip it for time.

0:43-0:45 — Thank you and close
Confirm you may follow up with a short clarifying question by email, thank them, stop recording.

Interviewer notes
- This respondent group may under-report cost as a reason due to social desirability; watch for it emerging indirectly (comments about "value," "worth it," "other things going on") even when not named directly, and gently probe those phrases rather than putting words in their mouth.
- Do not rush the 3-5 second silences in the laddering section — this is where IDIs earn their depth advantage over a group setting, since there's no social pressure to fill silence with a quick, safe answer.
- If a respondent seems uncomfortable with a question, offer an explicit out: "You're welcome to skip this one if you'd rather not go into it" — a sensitive-topic IDI should never feel like an interrogation.

Want a matching short screener to recruit the remaining 9 respondents, or a coding framework to analyze themes once all interviews are done?

The prompt

Here's the start of the prompt. Download the free bundle for the full, ready-to-paste version — plus the installable Claude Skill and Custom-GPT instructions.

# Role
You are a senior qualitative research interviewer who designs one-on-one in-depth interview (IDI) guides for food and beverage brands. You build for individual depth — laddering from concrete behavior to underlying motivation — and you know silence and indirection often surface more truth than a direct question.

# Context I'll provide
- Research objective: [OBJECTIVE]
- Topic: [TOPIC]
- Respondent profile: [RESPONDENTS — who, how many, how recruited]
- Interview length and format: [LENGTH / FORMAT e.g. 45 min video, in-person]
- Sensitivity level (optional): [SENSITIVITY — cost, health, guilt, or other loaded topics involved]

# Your task
1. If the objective, topic, or respondent profile are missing or vague, ask up to 3 clarifying questions BEFORE writing anything.

Frequently asked questions

What is an in-depth interview (IDI) in consumer research?
An in-depth interview is a one-on-one qualitative conversation designed to surface a single respondent's honest, undiluted perspective, without the social pressure or performance dynamic that comes with a group setting. It typically uses laddering, moving from a concrete behavior or event toward the underlying motivation or belief behind it. This skill writes that laddered guide, including techniques suited to sensitive or high-involvement topics.
How is this different from the Focus Group Discussion Guide Builder skill?
IDIs surface individual, undiluted perspectives and work well for sensitive topics where social pressure in a group would distort an honest answer — this skill is built around laddering one respondent at a time toward their real motivation, in private. The sibling Focus Group Discussion Guide Builder is built for the opposite goal: surfacing group dynamics and social norms, using techniques that deliberately provoke debate between multiple participants. Use this skill when you need someone's honest individual view; use the focus group guide when the group reaction itself is the finding.
Does this work with ChatGPT, Claude and Gemini?
Yes, any capable chat model runs it. The prompt is model-agnostic, so paste it into a chat, save it as a Custom GPT, or store it as a reusable skill so every researcher on your team builds interview guides with the same laddering discipline.
Does this predict what respondents will say?
No. It structures the questions, the laddering sequence, and the interviewer's technique — it does not generate or predict respondent answers. Any quotes or findings in your final report must come from the actual interviews you conduct, not from this skill.

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