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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.

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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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