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Design Codex

My Design Codex offers a comprehensive overview of design laws and principles, backed by my personal experiences and insights. As the field of design evolves, this codex will also evolve, being constantly updated with new knowledge and, of course, with some general improvements.

Psychological
Jakob's Law

Users' expectations are shaped by their experience with other sites.

Psychological
Miller’s Law

The average person can keep about 7 (± 2) items in their working memory.

Psychological
Hick’s Law

The time to make a decision increases with the number and complexity of choices.

Design & LayoutGestalt principle
Law of Proximity

Objects that are near each other tend to be grouped together.

Design & Layout
Understanding color codes

Colors are represented differently across mediums.

Usability & Interaction
Fitts's Law

The time to acquire a target is a function of the distance to and size of the target.

Behavioral Economics & Motivational
Sunk Cost Fallacy

People hesitate to quit a strategy due to past investments, even if future benefits don't justify ongoing commitment.

Ergonomics & Accessibility
Occam's Razor

Among competing hypotheses that predict equally well, the one with the fewest assumptions should be selected.