ABSTRACT
This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book reviews the various sources of evidence we can use to infer things about how we perceive and recognise faces and the kinds of theory we can construct about how the process is achieved – commenting along the way on the strengths and weaknesses of the different possible approaches. It examines the core agenda of what is known about how we see different things in faces. The book deals with the movements of our eyes and heads that indicate our direction of gaze – a potent social signal with a wide range of uses. It discusses the classic question of how we recognise faces and how representations change as people become familiar.
