“If children learn aggression from models, then children who watch violent television shows should be more aggressive than children who watch nonviolent shows.” is an example of a hypothesis.
According to Jean Piaget, the primary goal or need that leads children to change their ways of thinking to adapt to new experiences is satisfaction of id impulses.
Most of the early pioneers in psychology, such as Sigmund Freud, Erik Erikson, and Jean Piaget, favored the organismic perspective on human development, which views development as occurring in specific stages.