This volume of the Sociology of the Sciences Yearbooks stems from our experience that collaborations between non-scientists and scientists, often initiated by scientists seeking greater social relevance for science, can be of major importance for cognitive development. It seemed to us that it would be useful to explore the conditions under which such collaborations affect scientific change and the nature of the processes involved. This book therefore focuses on a number of instances in which scientists and non-scientists were jointly involved in the genera- tion of scientific results at the...