Fig. 4: The Epidemic Psychology on Twitter during the three contagion waves (shown in the top most panel) during the entire year of 2020.

A–H Temporally expands A–H in Fig. 1 with the only difference that the heatmaps in A–C here show values that were standardized using the mean and standard deviation calculated on the whole period of study, from 1 February to 31 December.