Design effective checkboxes by using square boxes, clickable labels, and clear, positive wording. List items vertically with instructions, and ensure legal checkboxes are unchecked by default to respect user consent.

Likert scales measure user opinions by asking participants to rate statements. They capture nuanced feedback but can face biases. To improve accuracy, use clear questions and techniques to reduce bias.

Use inclusive language for demographic questions. Ask about gender with multiple options, use ranges for age and income, differentiate race and ethnicity, and prioritize respectful, person-first language for disabilities.