This book describes and explores six current approaches to the study of mind: the neuroscientific, the behavioral, the competence approach, the ecological, the phenomenological, and the computational. No other book in cognitive science covers such a broad range of research programs and topics in such a balanced fashion. The first chapter is a mini-history and philosophy of psychology which reviews some of the scientific developments and philosophical arguments behind these six different approaches. Each subsequent chapter presents work that is on the frontiers of research in its field.