Interaction design is the process of identifying the path a user ought to take, and the most simple, useful actions that will send him or her along that path.

UX Unicorns and Other Fanciful Creatures UX Unicorns and Other Fanciful Creatures

Partly in response to Darren and partly to set the record straight, Andy Fitzgerald explains why we can't design experiences. Instead, we design for them. The difference is subtle, but important, as it direct affects how others understand the title of User Experience Designer.