Rutter et al. The English and Romanian (ERA) Adoptee Study

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Last updated: May 15, 2025

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Question	Answer
How many Romanian orphans that were adopted in Britain did the study follow?	165
Physical, cognitive and emotional development was tested at what ages?	4
	6
	11
	15
There was a control group of how many British children, adopted around the same time	52

Question	Answer
Approximately what percentage of the Romanian adoptees had abnormally low intelligence when they were first adopted?	50%
By age 11, the children were showing differing rates of recovery depending on their age of adoption. What was the mean IQ for those adopted before 2 months old?	102
For those adopted between 6 months and 2 years old?	86
And for those adopted after the age of 2?	77
Children adopted after the age of 6 months often showed what form of attachment, which is related to being equally friendly to people they know well and total strangers?	disinhibited