Fig. 2: Variation of the language categories over time. | Humanities and Social Sciences Communications

Fig. 2: Variation of the language categories over time.

From: How epidemic psychology works on Twitter: evolution of responses to the COVID-19 pandemic in the U.S.

Fig. 2

The number of recorded infections in the U.S. (A), and the average gradient (i.e., instantaneous variation) of all the language categories (B). There were three contagion waves in the year (shaded areas in A) and, for each wave, there were peaks in the gradient (marked with circles in B), which identify change-points, that is, periods in which the use of language considerably changed.

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