Jacob's Law

Users will expect it to work as written elsewhere.

This is a law advocated in 2000 by Jacob Nielsen, co-founder and CEO of the Nielsen Norman Group. Based on what users have learned when using other services, they ask, “Is this going to work?” It says what you think. From simple patterns such as “If I click the heart icon, it will be saved somewhere, right?” to “If I enter a keyword where there is a magnifying glass icon, I will be able to find what I want among the content here, right?” This is a law that can be applied to even complex patterns. You can think of it as loading a template stored in your head. A template is created through various experiences, and when a similar shape or device is found, the template is recalled. The template stored in your head like this is called a mental model.

Users will use other services much more than the service we created. You will absolutely use many of the most popular services of the era, as well as Android and Apple's OS. As you use it a lot, there will be a UI that is familiar to users, and you may feel more comfortable using patterns that you have already learned and are familiar with rather than a fancy UI that we have created anew. This law is in line with the premise that users should focus on the content provided by the service rather than using their mental energy to learn new ways to use it. It may also be related to my design, meaning that the content should be the main character rather than the interface.

reference

https://link.springer.com/article/10.3758/s13423-017-1367-8

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