Interaction design is all around us. If you’ve ever wondered why your mobile phone looks pretty but doesn’t work well, you’ve confronted bad interaction design. But if you’ve ever marveled at the joy of using an iPhone, shared your photos on Flickr, used an ATM machine, recorded a television show on TiVo, or ordered a movie off Netflix, you’ve encountered good interaction design: products that work as well as they look.
Interaction design is the new field that defines how our interactive products behave. Between the technology that powers our devices and the visual and industrial design that creates the products’ aesthetics lies the practice that figures out how to make our products useful, usable, and desirable.