Which term is the first step in rapid prototyping, widely used in user-centered design for designing and testing interfaces?

• A. Mechanical properties
• B. Particle boards
• C. Paper-based rapid prototyping
• D. Oxidization resistance

Answer: (C)

Paper-based rapid prototyping is the first step in rapid prototyping for designing and testing interfaces. It uses quick, paper sketches of screens and interactions to explore layout, navigation, and labels without any coding. The advantage is that it’s fast, cheap, and easy to modify, so you can test ideas with users early and iterate based on feedback before moving to digital versions. This fits user-centered design because it emphasizes early usability testing and learning from real user input. The other terms describe material properties or components, not a method for prototyping interfaces, so they don’t fit as the initial approach.