For a long time, academic psychology primarily focused on mental processes such as perception and thinking, while the areas of emotion, motivation, and will led a more shadowy existence, only beginning to emerge towards the end of the 20th century. Today, these topics are at the center of psychological inquiries. Based on current knowledge, Mark Galliker traces the history of these concepts by paying attention to the discourses of their respective times. Each chapter begins with a brief introduction to the school or research area. This is followed by a structured presentation of the relevant theories, authors, and psychologists, initially introducing the rich source material in a condensed form. A detailed, critical analysis of the corresponding theory and method is then provided, along with sections on the...