The study of human behaviour, and the minds that produce that behaviour, has been an occupation of scholars, artists, and philosophers for millennia. But it was not until the turn of the twentieth century that psychology came into its own as a distinct field of study--and, more importantly, as a scientifically legitimate field of study. When we view psychology as a science, certain questions naturally emerge: what sorts of phenomena does psychology seek to explain? What is distinctive about the kinds of explanations adduced in this science? How do these explanations integrate with theories...