The machine and the girl together could get through about a year's development theory in a day.

There have been several major phases of development theory since 1945.

From 1948 to 1953 he developed his highly influential theory of human development and education.

It is widely considered to be one of the most important concepts in modern development theory.

He is most famous for establishing a theory of organizational development.

Musical experiences are explained with theories of early personal development.

From the beginning of the 1980s, neoclassical development theory really began to roll out.

Ecological economics and human development theory try to separate the economic questions from others, but it is difficult.

His theory of cognitive development can be used as a tool in the early childhood classroom.

In his theory of cognitive development, thought is based on actions on the environment.