Perception & Gestalt
Law of Prägnanz
People perceive and interpret ambiguous or complex shapes in the simplest form possible.
Mechanism
Why it happens
The visual system defaults to the lowest-effort interpretation of a shape, resolving ambiguity toward symmetry, regularity, and simplicity.
Impact
Why it matters
- Visual complexity that carries no meaning still costs processing effort
- The eye simplifies whether or not the design intended it to
- A clean underlying grid reads as more trustworthy and more finished
Example
Without vs. with
A dashboard card mixes three border styles, two shadow depths, and a gradient header for no functional reason.
The same card uses one border weight, one shadow, and a flat header, so the content reads as a single clear shape.
Checklist
How to apply it
Favour simple, regular shapes and grids over busy or irregular layouts
Align elements to a clean underlying grid instead of fighting the eye's urge to simplify
Remove borders, shadows, and gradients that add complexity without adding meaning
When in doubt, remove detail rather than add it
Where it shows up