Empiriceme · Precept · Normative Principle

Jakob's Law

Users spend most of their time on other products, so they expect yours to work the way those do.

Nielsen's 2000 rule, and the reason interface novelty is usually a cost. It is the interface case of the principle of least astonishment, and it argues against distinctiveness for its own sake.

In practice

  • A banking app that puts the balance where every other banking app puts it is used correctly; the one that innovates is not.
  • A checkout that asks for the card number before the address is abandoned more often, because every other checkout asks in the other order.
Standing
The interface case of the principle of least astonishment.
Subject
Design & Systems
Essay
Rules of thumb for building things that work

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