Gardner proposed a theory of multiple intelligences that suggests there is more than one intelligence – He considers children and adults to be individuals who all have skills and areas that we enjoy and excel at and that these fit into our major intelligence.

Piaget discovered that all children’s cognitive development progressed through four stages, beginning in infancy and are completed by adolescence. Thinking becomes more and more complex as the child ages. Each stage of thinking causes the child to see the world in a different way.

Erik Erikson developed a psychosocial theory to understand how we each develop our identities through eight stages of psychosocial development from infancy to adulthood. The following article provides information on Erikson's Eight Stages, Eriksons Theories In Practice and more.