Developmental Psychology: Childhood and Adolescence by David R. Shaffer and Katherine Kipp

The aim of this book is to seek answers for these and many other fascinating questions about developing persons by reviewing the theories, methods, discoveries, and many
practical accomplishments of the modern developmental sciences. This introductory chapter lays the groundwork for the remainder of the book by addressing important issues
about the nature of human development and how knowledge about development is gained. What does it mean to say that people “develop” over time? How is your experience
of development different from that of developing persons in past eras or in other cultures? Why are scientifi c studies of human development necessary? And what strategies,
or research methods, do scientists use to study the development of children and adolescents? Let’s begin by considering the nature of development.