Wharton’s four questions for user-centered HCI

Tale of two tutorials

4 questions for a cognitive walkthrough:

• How do users know their goal is attainable?
• How do users know what to do?
• How will users know they have done the right thing?
• How will users know they have attained their goal?

Now this may come as something of a surprise if you are primarily involved in HCI, but these questions are profound to software and web site developers since most will never have considered user interaction in this way