What is the main focus of developmental psychology?

The main focus of developmental psychology is indeed on changes in behavior over time. This field studies how and why humans change throughout their lifespan, including physical, cognitive, emotional, and social development. Developmental psychologists investigate various factors that contribute to these changes, such as genetics, environment, culture, and individual experiences.

This approach embraces a broad spectrum, examining developmental stages from infancy through old age, and considers both the continuity and discontinuity of development over time. By observing these changes, researchers can form theories about human growth and identify milestones that are considered typical for different age groups.

In contrast, the other options do not encompass the primary aim of developmental psychology. Biological processes are certainly a component of development but do not represent the whole field. Statistical analysis is a tool used in research across psychology but is not the focus of developmental psychology itself. Therapeutic methods may be relevant in clinical psychology or counseling but do not specifically define the scope of developmental psychology.