IQ and behavioural adjustment of ex-institutional adolescents.

A group of children raised in institutions until at least 2 years of age, then adopted or restored to a biological parent, have been followed longitudinally into mid-adolescence. No effect of early institutionalisation was found on IQ which depended largely on the type of family placement. Behavioural and emotional difficulties were more common in the ex-institutional group than in a matched comparison group, according to teacher questionnaires and interviews with the adolescents and their parents. The findings are discussed in relation to placement policy and the question of the long-term effects of early experience.