Fig. 1.

Social networks at the playground before and after lockdown, based on sensor data.

T1 = before the lockdown; T2 = after the lockdown; Distance between every pair of nodes (children) and the thickness of the edge between the nodes are based on the percentage of time these two children were interacting with each other, out of the total time they were both detected at the same time points during recess. The more time they spent together the thicker the edge between the nodes is and the more closely the nodes are positioned. The size of the node is based on the number of different partners the child interacted with, with larger size indicating a broader variety of interaction partners.