The document discusses key concepts in user experience (UX) design including mappings, affordances, constraints, and signifiers. It provides examples and definitions of each concept. Mappings express the relationship between a control and the object it manipulates, including spatial, biological, and cultural mappings. Affordances refer to how an object's physical properties provide clues about its use. Constraints intentionally limit an object's usage through physical, semantic, logical or cultural restrictions. Signifiers are social cues that can be interpreted to convey meaning.
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