Canon Library
The principles behind every audit.
Kweri doesn’t invent its opinions. Every finding traces back to an established principle of usability, design, accessibility or content. This is the library of those principles — 136 of them, in plain English, with their sources.
Highlights
A few from the library to dip into — each one a full write-up with examples and how Kweri checks for it. They change every time you visit.
Hick's Law
The more choices you show, the longer people take to decide — and the likelier they pick nothing.
Read →Colour Contrast & Legibility
Text needs enough contrast against its background to be read — WCAG's ratio is the floor, not the goal.
Read →The Squint Test
Squint at a page until it blurs — the most visually dominant elements should be the most important ones.
Read →Browse by category
Usability Heuristics
10Nielsen Norman Group's ten heuristics — the foundational checklist for interfaces that feel usable.
View 10 principles →Laws of UX
22The cognitive and psychological laws — Hick's, Fitts's, Jakob's — that shape how people use interfaces.
View 22 principles →Cognitive Principles
31How attention, memory and mental load decide what a visitor notices, understands and remembers.
View 31 principles →Gestalt Principles
4How the mind groups, organises and makes sense of what it sees on a page.
View 4 principles →Design Principles
44Practical principles for clarity, hierarchy, trust and conversion — the working craft of good design.
View 44 principles →Content & Messaging
10Saying what you do, who it's for and why — in plain language people can scan in seconds.
View 10 principles →Mobile & Touch
2Principles specific to small screens, thumbs and the realities of touch.
View 2 principles →Accessibility
5Making the web usable for everyone — the WCAG standards and the human issues behind them.
View 5 principles →Motivation & Engagement
8The Octalysis core drives — the human motivations behind why people engage, act and come back.
View 8 principles →See these principles on your own site
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