Normal Distribution

Principle

Data distribution forming a bell curve; average at the center. • Common in design for measuring anthropometrics, usability data. • Designing only for the average excludes a majority of users. • Design for the range between 1st and 99th percentile.

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Wayfinding

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Recognition Over Recall

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Entry Point

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Inverted Pyramid

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Three-Dimensional Projection

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Expectation Effect

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