Much of user-experience design borrows from methods that assume users have discrete & identifiable goals. However, this assumption can seriously inhibit designing for real human behavior, which (as we will see) often has less to do with rationality than we tend to think.
Andrew Hinton is Principal User Experience Architect at Macquarium, a user-experience consulting firm based in Atlanta, GA. Andrew has designed information systems and interfaces for Fortune 100s, small businesses and non-profits alike, as both an internal employee and an external consultant. Andrew has served as a co-founder and past board member of the Information Architecture Institute, and is a long-time member & supporter of IxDA.