Problem: Recent advances in brain research have provided important information about factors that affect the development of adolescents' brains. Piaget, J. (1969). The theory of stages in cognitive development. An address to the CTB/McGraw-Hill Invitational Conference on Ordinal Scales of Cognitive Development (February 9, 1969). CBT/McGraw-Hill. Duckworth, A., & Steinberg, L. (2015). Unpacking self-control. Child Development Perspectives, 9(1), 32-37. Santrock, J. W. (2023). Adolescence (18th ed.). McGraw-Hill Education. Need Assignment Help?