Les vingt lois d'UX à donner à ton agent
Twenty psychology principles applied to interfaces, which a video suggests giving to Claude as reference files. Choice and effort: the aesthetic-usability effect (an attractive design is judged more usable), Hick's law (decision time grows with the number of choices), Fitts's law (reaching a target depends on its distance and size), Jakob's law (people expect your site to work like the ones they already know). Memory: Miller's law (working memory holds about seven items, plus or minus two), recognition over recall (make visible what the user needs instead of asking them to remember it), the serial position effect (the first and last items of a series are best remembered), the von Restorff effect (what differs is remembered), the peak-end rule (an experience is judged on its peak and its end). Perception: proximity, similarity and common region (what is near, alike or in the same area reads as a group), visual hierarchy (the order in which the eye reads, set by size, contrast and position). Pace: the Doherty threshold (peak productivity under about 400 ms of response), the goal-gradient effect (the drive to finish grows as you get closer), feedback loops (the interface tells you what is happening, at the right time). Design: progressive disclosure (show the essentials, move advanced features elsewhere), Tesler's law (some complexity does not disappear, it moves), Postel's law (accept liberally on input, emit conservatively on output), Occam's razor (at equal explanatory power, the simplest hypothesis).
Strengths
- Twenty names for flaws you feel without being able to say them: a shared vocabulary between designer, PM and agent
- Can be handed as is to an agent as a screen review grid
Limitations
- These are observed tendencies, not physical laws: two laws can pull opposite ways on the same screen
- The durations and figures (400 ms, seven items) are guideposts, to confirm with your audience
Best for
- Reviewing a screen generated by an agent before showing it to anyone