Which universal design principle states that the design should be easy to understand regardless of user's experience, knowledge, language skills, or concentration level?

• A. Equitable Use
• B. Flexibility in Use
• C. Perceptible Information
• D. Simple and Intuitive

Answer: (D)

Designs should be easy to understand and use, regardless of a person’s experience, knowledge, language skills, or level of concentration. This is the idea behind Simple and Intuitive use. It means the interface relies on familiar patterns, standard controls, and clear, plain language so a new user can navigate and accomplish tasks without needing extensive instructions. When something is simple and intuitive, users can predict what will happen next, recognize options at a glance, and recover from mistakes quickly.

Other principles contribute in different ways: Equitable Use focuses on making the design usable by people with diverse abilities; Flexibility in Use supports multiple ways to accomplish tasks to fit different preferences and abilities; Perceptible Information ensures that information is accessible through different senses (vision, hearing, touch). But the emphasis on immediate understandability for a wide range of users aligns most directly with Simple and Intuitive use.