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Jakob’s Law

As explained in Everyday Data Visualization

Jakob's Law of Internet User Experience is the principle that users prefer interfaces whose interaction conventions resemble those of familiar interfaces.

Jakob’s Law says users prefer interfaces that behave like familiar interfaces. Familiar patterns reduce the learning curve, while novelty can make a design feel difficult before users discover its value. section 7.1.2

Apply the principle by:

  • Learning which apps, visualizations, and reports your users already use regularly. section 7.1.2
  • Borrowing interaction patterns from those references instead of inventing new controls without a strong reason. section 7.1.2
  • Treating familiarity as a usability advantage, not as a lack of originality. section 7.1.2

A familiar pattern beats a clever one

A tabletop gaming interface may have useful features yet still frustrate newcomers if its controls differ sharply from interfaces they know. People may tolerate that friction when they have already invested heavily, but new users have less reason to persist. section 7.1.2

How Everyday Data Visualization covers it

How deep it goes
Defines familiarity, explains its effect on learning and adoption, and recommends lightweight user research without prescribing implementation details.
Examples
Uses virtual tabletop software, social-media redesigns, rearranged grocery aisles, and business reports as familiarity examples.
What you can do after
Apply familiar interaction patterns by studying users’ preferred apps, visualizations, and reports before designing.
How it connects
Connects interaction patterns with user experience, data visualization, learning curves, habits, and user research.

Related concepts

This explainer was generated by Manning's knowledge graph from the text of Everyday Data Visualization. The section links point to the parts of the book it draws on.