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

Fig 1

The solid blue line shows the average yearly sentiment of headlines across 47 popular news media outlets.

The shaded area indicates the 95% confidence interval around the mean. A statistical test for the null hypothesis of zero slope is shown on the bottom left of the plot. The percentage change on average yearly sentiment across outlets between 2000 and 2019 is shown on the top left of the plot.

Fig 1

doi: https://doi.org/10.1371/journal.pone.0276367.g001