What is design interaction design?
Interaction Design (IxD) is the design of interactive products and services in which a designer's focus goes beyond the item in development to include the way users will interact with it. Thus, close scrutiny of users' needs, limitations and contexts, etc. empowers designers to customize output to suit precise demands.
What do you think interaction is important for design?
* Interaction design determines how people interact with computers and communications. This is an issue of profound economic and cultural importance. * Interaction design determines the value of a communication service to its users, and the quality of experience they have when using it.