Thinking, Fast and Slow is a 2011 popular science book by Israeli-American psychologist Daniel Kahneman that distinguishes between two cognitive modes: System 1 (fast, intuitive, emotional) and System 2 (slow, deliberative, logical). The book synthesizes decades of research on cognitive biases, heuristics, and decision-making, becoming a New York Times bestseller and winning the 2012 American National Academies Communication Award, though some cited studies have faced replication concerns.
A 1994 article presenting ten usability heuristics for user interface design, including principles like system visibility, real-world matching, user control, consistency, error prevention, recognition over recall, flexibility, minimalist aesthetics, error recovery, and documentation. The heuristics emphasize clear communication, intuitive design, user autonomy, and preventing problems before they occur.