Nanson et al21 conducted a prospective cohort study comparing children with FAS or FAE with normal developing (control) children and children with attention deficit disorder (ADD) without FAS or FAE. Behavioral characteristics were similar between the FAS/FAE and ADD groups. There were no differences on parental rating for the two groups, suggesting it is difficult to distinguish between the two groups using traditional observational scales. The FAS/FAE group tended to have slower performance and was more likely to improve with practice than the ADD group. Unlike the ADD group, the FAS/FAE group was not able to trade off accuracy in favor of increased speed.21
