Jakob Nielsen, Ph.D., is a retired principal and co-founder (with Dr. Donald A. Norman) of the Nielsen Norman Group. Jakob established the "discount usability engineering" movement for fast and cheap improvements of user interfaces and invented the heuristic evaluation method.
Increase the reliability and validity of your research findings by incorporating multiple research techniques and following study-design best practices, as explained by Jakob Nielsen at the UX Conference in Las Vegas.
Jakob Nielsen answers an audience question about why some designers keep making UX mistakes like including design elements that are ignored due to banner blindness, from the UX Conference in London.
Across 33 rich countries, only 5% of the population has high computer-related abilities, and only a third of people can complete medium-complexity tasks.
Testing finds that Chinese and Western users experience the same difficulties with complex sites, but Chinese tend to complain less about complexity and prefer fairly high information density.