In addition to over 800 new research citations, the tenth edition of Adolescence features updated and expanded coverage of key issues in development in every chapter. A new feature, “Making the Connection,” replaces the “Food for Thought” feature and focuses on the application of research findings to everyday life, social policy, and practice, and on the ways in which adolescent development may be affected by cultural context. Below we present a complete list of changes in each chapter:

Chapter 1
Thorough update of all content (more than 70 new citations)
Expanded discussions of causes of the decline in the age of puberty
Expanded discussion of adolescent sleep
Expanded discussion of adolescent obesity
Expanded discussion of eating disorders
Addition of discussion of the impact of puberty on brain development
Addition of material on body dissatisfaction among boys

Chapter 2
Thorough update of all content (more than 60 new citations)
Expanded discussion of structural and functional brain development in adolescence
Addition of material on “the social brain”
Addition of discussion of dual systems models of decision-making

Chapter 3
Thorough update of all content (more than 40 new citations)
Addition of discussion of the impact of Hurricane Katrina on mental health
Expanded discussion of neighborhood effects
Expanded discussion of impact of exposure to violence

Chapter 4
Thorough update of all content (more than 70 new citations)
Expanded discussion of familism
Addition of material on adolescents with lesbian or gay parents
Addition of material on adolescents in foster care

Chapter 5
Thorough update of all content (more than 60 new citations)
Expanded discussion of bullying
Expanded discussion of cyberbullying
Expanded discussion of the causes and consequences of having antisocial friends
Addition of material on victims responses to bullies, and their effectiveness

Chapter 6
Thorough update of all content (more than 40 new citations)
Expanded discussion of changes in No Child Left Behind under President Obama
Expanded discussion of learning disabilities
Addition of material on ADHD

Chapter 7
Thorough update of all content (more than 60 new citations)
Added discussion of why student employment has declined in the last decade
Revised discussion of youth unemployment to reflect the recent recession
Expanded discussion of impact of media violence
Updating of statistics on Internet use
Addition of extensive discussion of the impact of the Internet (and social networking sites in particular) on adolescent development, including Internet addiction
Expansion of discussion of the impact of social networking sites

Chapter 8
Thorough update of all content (more than 60 new citations)
Extended discussions of ethnic identity development and discrimination.
Material on gender role development has been modified to be consistent with newer research indicating that adolescent males and females are not all that different.

Chapter 9
Thorough update of all content (more than 40 new citations)
Added discussion of the brain science of peer influence
Added material on civic engagement
Expansion of coverage of religious development.

Chapter 10
Thorough update of all content (more than 50 new citations)
Neuroscientific bases for individual differences in interpersonal functioning
Social networking and the quality of friendships
Extended discussion of co-rumination
Attitudes toward dating relationships
Dating violence

Chapter 11
Thorough update of all content (more than 70 new citations)
Dropped material on restrictive and permissive societies
Added material on genetic influences on sexual risk taking
Added material on transgender youth
Expanded discussion of LGBT youth

Chapter 12
Thorough update of all content (more than 40 new citations)
Added discussion of social and personality contributors to academic success
Added discussion of importance of parental expectations
Added table showing results of international achievement comparisons
Dropped discussion of development of occupational plans (outdated material)

Chapter 13
Thorough update of all content (more than 130 new citations)
Updated all statistics on prevalence and demographic differences in substance abuse, crime, and depression
Updated diagnostic criteria tables to be consistent with the new DSM
Added discussion of callous-unemotional traits and conduct disorder
Expanded discussion of the biological underpinnings of chronic antisocial behavior
Added discussion of non-suicidal self-injury