Observations of Rene Spitz - 1940’s:
Young children were raised in two different institutions,
*Prison nursing home: with open cribs, a lively environment
   and extensive interaction with the mother,
  (even though she lived in the prison next door)
*Foundling home with nurses caring for several babies:
   where cribs were shielded, there was no intimate interaction
   with the mother or other caregiver,
      and little opportunity for other social interaction

By the first birthday, children in the foundling home had
     susceptibility to disease;
   they were not walking or talking properly at 2-3 years old