Nielsen Norman GroupEvidence-Based User Experience Research, Training, and Consulting
Should the OK button come before or after the Cancel button? Following platform conventions is more important than suboptimizing an individual dialog box.
Lists of links are an intermediate case between content-embedded links and menu items. Showing listed links in blue or in the site's main link color is the recommended design - and the one most intranets follow.
A site did most things right, but still had a miserable 14% success rate for its most important task. The reason? Users ignored a key area because it resembled a promotion.
Interaction techniques that deviate from common GUI standards can create usability catastrophes that make applications impossible to use.
The 10 most general principles for interaction design. They are called "heuristics" because they are more in the nature of rules of thumb than specific usability guidelines.