FrontMatter -- Reviewers -- Contents -- Preface -- 1 Introduction: Why Study Adolescence? -- 2 Adolescents and the Risks That Affect Them -- 3 Biobehavioral Processes -- 4 The Psychology of Adolescence -- 5 The Influence of Environment -- 6 Looking to the Future -- References -- Appendix A: Workshop on Individual Processes -- Appendix B: Workshop on Social and Environmental Influences -- Appendix C: Workshop on Integrating Findings Across Domains of Influence.