Thoughts on Interaction Design explores the theory behind the field of Interaction Design in a new way. It aims to provide a better definition of Interaction Design that encompasses the intellectual facets of the field and the particular methods used by practitioners in their day-to-day experiences. It also attempts to provide Interaction Designers with the vocabulary necessary to justify their existence to other team members. The book positions Interaction Design in a way that emphasizes the intellectual facets of the discipline. It discusses the role of language, argument, and rhetoric in the design of products, services, and systems. It examines various academic approaches to thinking about Design, and concludes that the Designer is a liberal artist left to infuse empathy in technologically driven products. The book also examines the tools and techniques used by practitioners. These include methods for structuring large quantities of data, ways of thinking about users, and approaches for thinking about human behavior as it unfolds over time. Finally, it introduces the idea of Interaction Design as an integral facet of the business development process.