This volume represents the papers reviewed and accepted for the HOIT2007 conference held at the Indian Institute of Technology Madras in the city of Chennai, India in August 2007. This volume addresses many of the major themes of current interest in the field, with a particular focus on community-based technologies. This comprehensive book is divided into five different sections reflecting the most up-to-date research on computers and society.

Technologies that electronically mediate conversation, such as text-based chat or desktop video conferencing, draw on theories of human human interaction to make predictions about the effects of design decisions. This lecture reviews the theory that has been most influential in this area: Clark's theory of language use. The key concept in Clark's theory is that of common ground. Language is viewed as a collaborative activity that uses existing common ground to develop further common ground and, hence, to communicate efficiently. The theory (a) defines different kinds of common ground, (b) formalizes the notion of collaborative activity as a "joint action," and (c) describes the processes by which common ground is developed through joint action. Chapter 1 explains why a purely cognitive model of communication is not enough and what is meant by the phrase "collaborative activity." Chapter 2 introduces the idea of common ground and how it is used in language through an example of two people conversing over a video link. Chapter 3 indicates where the interested reader can find out about the antecedents to Clark's theory. Chapter 4 sets out the fundamental concepts in Clark's theory. Chapter 5 uses five published case studies of electronically mediated communication to illustrate the value of the theory. These include studies of a computer-supported meeting room (Cognoter), a video tunnel that supports gaze awareness, video conferencing in medical consultation, and text chat. Table of Contents: Motivation - Conversation as a Collaborative Activity / Overview - Developing Common Ground, An Example / Scientific Foundations / The Theory in More Detail / Case Studies - Applying the Theory to Electronically Mediated Communication / Current Status

This volume represents the papers reviewed and accepted for the HOIT2007 conference held at the Indian Institute of Technology Madras in the city of Chennai, India in August 2007. This volume addresses many of the major themes of current interest in the field, with a particular focus on community-based technologies. This comprehensive book is divided into five different sections reflecting the most up-to-date research on computers and society.

How should we understand and design for fun as a User Experience? This new edition of a classic book is for students, designers and researchers who want to deepen their understanding of fun in the context of HCI. The 2003 edition was the first book to do this and has been influential in broadening the field. It is the most downloaded book in the Springer HCI Series. This edition adds 14 new chapters that go well beyond the topics considered in 2003. New chapter topics include: online dating, interactive rides, wellbeing, somaesthetics, design fiction, critical design and participatory design methods. The first edition chapters are also reprinted, with new notes by their authors setting the context in which the 2003 chapter was written and explaining the developments since then. Taken with the new chapters this adds up to a total of 35 theoretical and practical chapters written by the most influential thinkers from academia and industry in this field.