3D Touch poses some physical challenges for users. Designers should use it as an enhancement, not a requirement for a good user experience.| Nielsen Norman Group
Recalling items from scratch is harder than recognizing the correct option in a list of choices because the extra context helps users retrieve information from memory.| Nielsen Norman Group
Responsive design teams create a single site to support many devices, but need to consider content, design and performance across devices to ensure usability.| Nielsen Norman Group
Jakob Nielsen's 10 general principles for interaction design. They are called "heuristics" because they are broad rules of thumb and not specific usability guidelines.| Nielsen Norman Group