A Study of Social Development in Early Infancy

The babies for the most part lay in separate cribs, about ten in a room. They were grouped in wards roughly according to age. In one room were infants of one to three months old, in others respectively were those of three to six months, six to nine months, nine to twelve months, twelve to fifteen months, and fifteen to twenty-four months of age. The new-comers, usually about two weeks old, were kept isolated in cubicles for fourteen days for medical observation. If they were found to be normally healthy and not requiring special attention they were then placed in the wards. During the three months that the children were under observation the