Jakob Nielsen recently published his report on iPad’s usability and application interface consistency.  To no one’s surprise, he discovered a few issues.

What was the main problem Jakob uncovered?  Many iPad applications aren’t obvious to use:  non standard controls, confusing graphics, and counter-intuitive metaphors.  In psychology parlance, it’s because these apps lack constraints and affordances.

Read more on Walking Into The Wrong Bathroom: Lack of Affordances…

affordances · constraints · Jakob Nielsen · user interfaces