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Perception

Similarity principle

A Gestalt principle: we see things as belonging to a group or a category if they are similar in shape or colour.

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A Gestalt principle: we see things as belonging to a group or a category if they are similar in shape or colour.

Colour coding systems and icon systems use the Similarity principle.

We see the red dots as belonging to a single category, even though they are not aligned or physically close.

How this helps
This principle is explains why you might use colour coding or icons to signal different information types in your document.
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