Thoroughly revised and updated the third edition of this text builds on the strengths of the previous edition. Focusing on every major topic of psychobiology, this edition now has a greater emphasis on research methods. The full colour art programme has also been enhanced. Included with every copy of the book is a student CD-ROM which is closely integrated with the text. New features include: a new Fact or Fiction? section in Chapter 1 spotlights some popular beliefs about biological psychology, each linked by page reference to in-depth discussions in subsequent chapters; research methods are given greater emphasis and are described in greater detail; discussions of clinical disorders are delineated more clearly in the text; the full-colour art programme has been further refined; more than 300 new references, all cited in the text, have been added; new research helps to round out or give new perspectives on major topics; and some older material has been condensed or deleted, keeping the text at its previous length.