This book is a collection of articles covering the theme of interaction. Interaction combines two crucial elements: the intrapersonal and the interpersonal. Accordingly, the authors approach this issue from two complementary perspectives: from the internal and external or cognitive and social perspective. The papers that take the former perspective focus on cognitive bases of interaction, on the representation of motion, on metaphor and metonymy, or gestures, perception and cognition. The topic that dominates the papers that take the social stance towards the topic of interaction is identity. By applying a variety of new analytical tools and concepts, the authors show how we build images of ourselves through language, how society and institutions mould us into different categories, and how we negotiate our membership of these categories.