Which term is often the first step in rapid prototyping used in UCD for designing interfaces?

• A. Particle boards
• B. Paper-based rapid prototyping
• C. Mechanical properties
• D. Natural fibres

Answer: (B)

In rapid prototyping for interfaces, starting with a quick, low-fidelity approach lets you explore ideas and user flows without heavy effort. Paper-based rapid prototyping is the most practical first step because you can sketch screens, layout elements, and navigation on paper, test with users, and iterate instantly based on feedback. It keeps the focus on how the interface will feel and work, rather than on polished visuals or code.

The other options are about physical materials or properties rather than a method for testing interface ideas. Particle boards, mechanical properties, and natural fibres are relevant to physical product construction or material science, not to early-stage interface prototyping.