1073 design guidelines to improve conversion rates and customers' shopping experience. 13 volumes, with more than 3100 screenshots that worked or failed in user testing.| 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
Guidelines for usability test tasks: engage participants by writing task scenarios that are realistic, encourage an action, and don't give away how the interface should be used.| Nielsen Norman Group
Use psychology to predict and explain how your customers think and act.| Nielsen Norman Group