Martin Farrell is an Honorary Lecturer in the School of Psychological Sciences at the University of Manchester. With over fifteen years' experience of teaching psychology, he has lectured on many aspects of the discipline but his main focus has always been on the interface between psychology and philosophy. He has lectured on the history of psychology for more than ten years, on consciousness for thirteen years, and has taught philosophy of science to postgraduate students for six years. This book is the fruit of this accumulated experience.