Book excerpt: This third edition of Child Psychology continues the tradition of showcasing cutting-edge research in the field of developmental science, including individual differences, dynamic systems and processes, and contexts of development. While retaining a similar structure to the last edition, this revision consists of completely new content with updated programmatic research and contemporary research trends and interests. The first three sections highlight research that is organized chronologically by age: Infancy, Childhood, and Adolescence. Within each section, individual chapters address contemporary research on a specific area of development, such as learning, cognition, social, and emotional development at that period in childhood. The fourth section, Ecological Influences, emphasizes contextual influences relevant to children of all ages, including risk and protective processes, family and neighborhood context, race and ethnicity, peer relations, the effects of poverty, and the impact of the digital world. Child Psychology also features a unique focus on four progressive themes. First, emphasis is placed on theory and explanation—the "why and how" of the developmental process. Second, explanations of a transactional and multidimensional nature of development are at the forefront of all chapters. Third, the multi-faceted approach to development highlights contextual influences and cultural diversity among children from different communities and backgrounds. Finally, methodological innovation is a key concern, and research tools presented across chapters span the full array available to developmental scientists who focus on different systems and levels of analysis. The thoroughness and depth of this book, in addition to its methodological rigor, make it an ideal handbook for researchers, practitioners, policy makers, and advanced students across a range of disciplines, including psychology, education, economics and public policy.