4Deak,G.O.The development of cognitive flexibility and language abilities.In:R.Kail (Ed.).Advances in Child Development and Behavior.San Diego,CA:Academic Press,2003:271-327
5Zelazo,P.D,Frye,D,& Rapus,T.An age-related dissociation between knowing rules and using them.Cognitive Development,1996,11:37-63
6Zelazo,P.D,Ulrich Muller,Frye,D,& Stuart Marcovitch.The development of Executive Function in early childhood.Monographs of the society for research in child development,2003,68(3):28-73
7Perner,J,& Lang,B.What causes 3-year-olds'difficulty on the Dimensional Change Card Sorting task? Infant and Child Development,2002,11:93-105
