A door may afford pulling or pushing, depending on which way it opens. When a person can see in advance whether to pull or push the door to open it, that’s a good user interface.
A former Sun Microsystems Engineer and "The world's leading expert on Web usability" (www.useit.com).
The path to a clean, complete, well-considered product is messy, messy, messy.
A veteran of the experience design industry, author of the book The User Experience Team of One, and VP of Experience at Publicis Sapient.
Your objective should always be to eliminate instructions entirely by making everything self-explanatory, or as close to it as possible. When instructions are absolutely necessary, cut them back to the bare minimum.
A usability consultant (Apple, Netscape, AOL, Lexus) and a highly sought-after speaker on usability design.
Everything has to be validated. If something can’t be explained, it gets the boot. This may be the only unbreakable rule in my office.
A graphic designers and author of the book "The Typographic Desk Reference".