The unusual question: Surprisingly, it is a rare client indeed who asks the opposing question: why is an interface so engaging that users cannot stop interacting with it? This is a difficult question because it requires cognitive reverse engineering to determine what interaction attributes a successful interface embodies that result in a psychologically engaging user experience. This question yields to experience and professional usability analysis. The answer to this persistent question is complex but never truly elusive. The usual question: Over the past 40+ years as a consultant in the field generally known as human factors engineering (aka usability engineering), I have been asked by hundreds of clients why users don’t find their company’s software engaging. « Why Cisco flipped over the Flip Video Cam (and paid $590 million for a small dose of simplicity) - The Science Behind User Experience UX Design and Usability Testing » Why Angry Birds is so successful and popular: a cognitive teardown of the user experience

Angry birds friends week 34 level 4