I will investigate the development of cognitive processes in children that support attention management, planning and problem-solving, called Executive Functions (EFs). Three key EFs are working memory, inhibitory control and shifting (or cognitive flexibility). I will explore how they develop and interact, evaluating the overall structure of EF. To do this, I will develop new cognitive tasks that combine visual and sound prompts to measure different kinds of EF in pre-school age children. I am hoping to gain new insight into how EF develops and is structured, informing more effective early strategies supporting learning and socialising in young children.