Policy evaluation studies, which assess the effect of an intervention, face statistical challenges: in real-world settings treatments are not randomly assigned and the analysis might be complicated by the presence of interference among units. Researchers have started to develop methods that allow to manage spillovers in observational studies;…

Presents a French study of the impact of providing knowledge about text superstructure on children's ability to improve text through predefined revising strategies. Reports that children exposed to a similar reading task before revising tended to improve text correctly and use the most efficient strategy. (DK)