Nielsen Norman GroupEvidence-Based User Experience Research, Training, and Consulting
Quality assurance impacts the user experience: when things don’t work, users question their understanding and develop superstitions and inefficient workarounds.
What's worth the most: field studies or user tests? Depends on your company's usability maturity, but user testing is the safe bet if you can do only one thing.
When a multinational company produces a localized country site, usability is often lost. Local advertising agencies design good-looking sites that don't communicate.
3 approaches to better design: each has its uses, but the costs, benefits, and risks differ dramatically.
User testing on 3 continents confirmed that the main usability guidelines hold worldwide, but many other considerations exist to better support international users.