How is 'learnability' defined in the context of interface design?

Learnability in the context of interface design refers to how easy it is for new users to begin using a design for the first time. When an interface is designed with learnability in mind, it facilitates quick understanding and adoption by users who may not have prior familiarity with it. This involves intuitive navigation, clear labeling, and user-friendly features that guide beginners through their initial interactions. The goal is to enable users to accomplish basic tasks without requiring extensive training or prior experience, allowing them to engage with the interface effectively from the outset.

By prioritizing learnability, designers ensure that interfaces can accommodate a wide range of users, enabling them to quickly grasp essential functions and features. In this way, interface design that emphasizes learnability can significantly enhance the user experience and reduce frustration for first-time users. Other aspects mentioned, such as memorability or accuracy, relate to different dimensions of user interaction but do not specifically capture the concept of learnability, which focuses on the initial onboarding experience with the design.