Usability Psychologist Skill

When to Apply

Apply this skill when the request involves:

• "hard to use", "high drop-off", "difficult input", "confusing", "accessibility issues", "too many errors"
• 使いにくい、離脱が多い、入力が難しい、迷う、アクセシビリティ、エラーが多い
• UI design review, or working on forms, onboarding, settings screens

Core Principles

• Usability is cost, not preference. Reduce confusion, memory burden, operation count, and error rate.
• Cognitive load. Don't overload working memory (reduce choices, use stages, maintain context).
• Accessibility. Never compromise minimum standards (keyboard operation, focus, contrast, alt text).

Design Philosophy (Decision Rules)