SAMPLING. THE REGULAR SERIES OF THE BRUSH FOUNDATION.

The article focuses on the study of the Brush Foundation's regular selection of children for a long-term growth and development. The children consist of a selected sampling of the Greater Cleveland child population which is made according to two criteria such as the freedom of children from gross physical and mental defects and the voluntary participation and agreement to continued participation in the study by the parents of the children. The children are examined from infancy through adolescence wherein they are enrolled at the age of three months and are assessed throughout the duration of the program.