The study of human development is a rich and varied subject. We all have personal experience with development, but it is sometimes difficult to understand how and why people grow, learn, and act as ...

Jean Piaget’s theory of cognitive development has been a central framework for understanding how children grow and learn. His model describes development through four sequential stages: sensorimotor, ...

From Aristotle to Sigmund Freud and Abraham Maslow, countless theories and concepts for understanding personality have been proposed. Throughout history, these and other great minds sought to answer ...

Oral fixation may occur if a person’s needs are not met during a specific stage of childhood development, according to a theory introduced by psychoanalyst Sigmund Freud. Oral fixations include habits ...