Piaget's stages of development group intellectual development from infancy through adulthood into phases. His theory has significantly influenced the science of child development and may help ...

By age 30, those early assessments accounted for about 13% of the variance in adult cognitive scores, with environment in the ...

The first stage in Erikson’s stages of psychosocial development theory begins in infancy. “Infants need adult protection and support or they will not survive,” says Frank Worrell ...

Lives in the 1950s could be cut into three distinct categories: child, adult and old, each life stage occurring from 0-12, 13-60 and 61-69 respectively, a new report by demographer Bernard Salt says.