1. 165 Romanian orphans who spent their early lives in institutions- suffered institutionalisation
2. 111 were adopted before the age of 2 years and 54 by the age of 4
3. Tested at regular intervals (4,6,11,15) to assess their physical, cognitive and social development
4. Info also gathered in interviews with parents and teachers
5. Progress compared to a control group of 52 British children adopted before the age of 6 months