Technique · Hooked
Itch finder: ask why until a feeling appears
Find the internal trigger by studying what users feel just before they act. Write a short story of that moment, then keep asking why until a feeling shows up, such as boredom, loneliness, frustration, confusion, indecision or fear. Check the answer against observed behavior, not survey replies.
Plain label: find the feeling behind the useAlso known as: internal trigger research, 5 Whys, emotion inventory, revealed preference, user narrative, diary study, itch
How it works
Internal triggers are learned links between a recurring feeling or routine and the product that relieves it. Unpleasant feelings are the most common prompts because they create mild discomfort that people act to remove, often without noticing. Users rarely name these feelings when asked, so the method relies on stories of the moment before use, repeated why questions and observed behavior.
Evidence warning
Different personas often reach different root feelings; run the questions per persona and per core action.
How to build it
- B2B
- Shadow two or three users through a working day and note what happened in the minutes before they opened the tool, then run the why questions on that moment.
- Mobile
- A one-week diary in which users log what they were doing and feeling right before opening the app.
- Web
- Pair replays of returning visitors' sessions with short interviews about what prompted that visit.
What can go wrong
- Stopping at a functional answer ('to save time') before a feeling appears.
- Merging personas whose roots differ.
- Mistaking a feeling the product creates for one it relieves.
Pairs well with
- Write the result as a one-line habit statement.
- Time external triggers to the moment the feeling shows up.
In practice
Where it shows up
Limits
What we don’t claim
- The Hook Model is a practical design tool, not a validated or complete theory of behavior.Hooked, Introduction
Sources
Hooked · Nir Eyal
Ch.2 · Ch.1 · Ch.8
Source IDs: HK-T04HK-TRG14HK-TRG17HK-TRG18HK-TRG19HK-TRG20HK-TRG21HK-TRG22HK-TRG23HK-STR03HK-STR14HK-MEA08
Book content is paraphrased, never quoted at length. Last verified October 24, 2026.
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