A clear, thorough and focused introduction to the key theories of personality. This edition retains a distinctive presentation of theories on the framework of their underlying basic assumptions. This edition has been thoroughly updated mixing research and personal applications in each chapter. Some new theorists have been added and a new chapter covers research methods, assessment techniques and ethical issues. Now available with the third edition, a current research application manual. The book presents key concept s and principles of several different personologists. A total of 18 classic theorists are covered in-depth, focusing on basic assumptions underlying theories concerning human nature. Each chapter includes several examples, illustrations and applications section and offers a comprehensive and balanced account of theory, research and applications. New current research supplementary manual is free to students.