Although the paediatric literature in the area of executive function has expanded significantly over the past 20 years, there is still an imbalance of knowledge when compared to the adult literature. The present project sought to redress the balance in executive function research by (1) investigating the development of a wide range of executive processes in children between the ages of 3 and 7 years, and (2) examining the effects of early frontal lobe damage on the ongoing development of these skills.