Constraint

Principle

Limits the actions that can be performed on a system. • Two types: physical (paths, axes, barriers) and psychological (symbols, conventions, mappings). • Improves usability and reduces errors. • Use symbols for warning, conventions for common understanding, and mappings for intuitive interaction.

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Further Readings
https://lawsofux.com/constraints/

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Archetypes

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Inverted Pyramid

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Depth of Processing

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Flexibility-Usability Tradeoff

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Most Average Facial Appearance Effect

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Control

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