ITEC 3230 LAWS

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Last updated 1:44 AM on 4/13/26
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13 Terms

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Fitts’s Law

Time to reach a target depends on size and distance

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Hick’s Law

More choices increase decision time.

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Jakob’s Law

Users expect familiar design patterns.

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Miller’s Law

People remember 7 ± 2 items (five to nine).

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Tesler’s Law

Some complexity is unavoidable.

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Parkinson’s Law

Tasks expand to fill available time.

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Postel’s Law

Be flexible in input, strict in output.

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Doherty Threshold

System response should be under 400ms.

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Occam’s Razor

Simpler solutions are better.

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Pareto Principle

80% of results come from 20% of causes.

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Zeigarnik Effect

Unfinished tasks are remembered better.

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Von Restorff Effect

Distinct items are more memorable.

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Gestalt Principles

are guidelines for how our brains make sense of what we see. They explain why we naturally group things together, spot patterns, and understand complex visuals.