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Longitudinal analysis of sentiment and emotion in news media headlines using automated labelling with Transformer language models

Fig 4

Yearly prevalence of headlines denoting different types of emotionality in 47 popular news outlets grouped by human ratings of news media ideological leanings from the 2019 AllSides Media Bias Chart v1.1 [24].

Note the different scale of the Y axes for the different emotion types. Only statistical tests within each ideological grouping for which the null hypothesis of zero slope was rejected (after Bonferroni correction for multiple comparisons) are shown on the bottom left of each plot.

Fig 4

doi: https://doi.org/10.1371/journal.pone.0276367.g004