A weakness of institutionalisation studies?

-Studying children from Romanian orphanages might have introduced confounding variables -Eg: the quality of the care in these institutions was remarkably poor, with children receving very little intellectual stimulation or comfort. -This means that the harmful effects seen in the studies of Romanian oprhans may represent the effects of poor institutional care rather than institutional care and therefore it is hard to apply these results to wide variety of countires and all institutions. -Lack of external validity is a result of the unusual situational variables due to the harsh political regimes in Romania at the time and so the conditions of care cannot be considered typical.