Young children’s performance on a design fluency task: longitudinal data on total number of designs, clustering and switching, and regression-based norms

Introduction Design fluency (DF) tasks are commonly used to assess executive functions such as attentional control, cognitive flexibility, self-monitoring and strategy use. Next to the total number of correct designs, the standard outcome of a DF task, clustering and switching can help disentangle the processes underlying DF performance. We present the first longitudinal study of 4–8-year-old children's developmental DF trajectories.