165 children from a Romanian orphanage were examined
• 111 were adopted before the age of two
• 54 were adopted by the age of 4
Rutter compared these children to a control group of 52 British children who had been adopted before the age of 15 months (❌Not exposed to the same conditions)
They assessed the children when they were aged 4, 6, 11 and 15 to assess their physical cognitive and social development
Data was gathered through interviews with parents and teachers