Excess kurtosis of the distribution of radial deformations as a function of sampling time τ avg for an active (red) and a passive (blue) GUV. The circles indicate the mean, the shaded area indicates the s.d. and the dashed lines indicate the minimum/maximum kurtosis. Data are generated by extracting frames from recordings of a given duration τ avg and computing the kurtosis of the distribution of radial deformations. At a short timescale, the difference in spread between active and passive is noticeable.
