Sensitivity to length of time frame of sampling. Network properties were recalculated using only the first 50% of the interactions on all network data sets for which temporal information are provided. (A) Social fluidity as estimated in the main text is shown as blue triangles, and estimated using only the first 50% of interactions is shown as red circles. In one network (highschool 4), the process for computing did not converge to a solution, this is an issue that occurs when the number of interaction partners remains very low. (B and C), mean degree of the network and number of nodes (with degree ), respectively, calculated from the full data is shown as blue triangles, and using only the first 50% of interactions as red circles. (D) Social fluidity estimated using only the first 50% of interactions is shown as blue triangles. Red circles show the value of using the first 50% of the interactions but using the value of taken from observing all the interactions. Note that this value of will be larger as it contains nodes that will be isolates, i.e. have in the 50% subsample network.