Laws of UX Design Principles

Laws of UX is a free online reference collecting the best design principles and psychological heuristics that designers apply when building user interfaces. Created by Jon Yablonski, a product designer and front-end developer based in Detroit, Michigan, launched in 2017. Featured by A List Apart, Smashing Magazine, and CSS Design Awards. Key content: organizes design laws into categories including Heuristics, Principles, Cognitive Biases, and Gestalt Principles. Each law includes a definition, original research source, key takeaways, and practical examples. Featured laws: Fitts Law (time to acquire a target is a function of distance and size), Hick Law (decision time increases with number of choices), Jakob Law (users prefer sites that work like other sites they know), Miller Law (average person keeps 7 plus or minus 2 items in working memory), Parkinson Law (tasks inflate to fill available time), Serial Position Effect (users best remember first and last items in a series), Tesler Law (Conservation of Complexity, every system has irreducible complexity), Doherty Threshold (when computer and user interact at pace where neither waits, productivity soars), Aesthetic-Usability Effect (users perceive attractive interfaces as more usable), Von Restorff Effect (the item that differs from the rest is most likely remembered). Includes downloadable poster set and companion book by Jon Yablonski published by O'Reilly. HTML/CSS/JS. CC-BY.