Interaction Design, User Centric Design, User Interface Experience and Scrum fits very well together if people who are in Scrum Teams stop thinking in GETTING IT RIGHT THE FIRST TIME. The conflict that lies within the Interaction Design approach and Scrum [1] is the same conflict that we had in the software development industry since the beginning. If we know exactly how the result should be, than we can build it. Unfortunately this way of thinking creates a big problem: Speculation!

Scrum tried to solve all this: It is forbidden to have a prototype as a Sprint result. That you need a prototype for some causalities within a Sprint, ok. But not as a final result. Designers and developers need to work closely together within a Sprint. Stop believing you could or should know in details what you need to build in advance. Build it with the best ideas, check the result in the reality with the real thing and then do it again if you must.

[1] Interaction Design and Extreme Programming, http://stuq.nl/weblog/2009-02-11/interaction-design-and-extreme-programming