By Elizabeth Nolan Brown, Reason
Language is getting less rational. That’s the gist of new findings from researchers at Wageningen University & Research (WUR) and Indiana University. Their study—”The rise and fall of rationality in language,” published in the Proceedings of the National Academy of Sciences of the United States of America—found that the past 40 years have seen a shift from the language of rationality to the language of emotion.
“Whatever the drivers, our results suggest that the post-truth phenomenon is linked to a historical seesaw in the balance between our two fundamental modes of thinking: Reasoning versus intuition,” study co-author Ingrid van de Leemput said.
The researchers looked at the language used in millions of English- and Spanish-language books published between 1850 and 2019, analyzing the use of 5,000 frequently used words. The rise of reasoning words like determine and conclusion and the decline of intuitive words like feel and believe could be seen starting around 1850 and lasting until the late 20th century. But over the past 40 years, this trend reversed, as words associated with intuition and emotion were used more frequently and words associated with fact-based arguments were used less frequently.
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