A new chapter (15) on adolescent health has been added, covering topics such as stress, exercise, and eating disorders

This edition includes a more extensive research focus, with more than 1,200 21st century citations and greater emphasis on culture, college and emerging adulthood, and health and well-being

Coverage has been revised and reorganized where appropriate, to improve the overall clarity of the presentation. For example, Chapter 7 (Sexuality) has been restructured and there is a new section on sexual attitudes and behavior.