Presidential debate speech has gotten simpler, shorter, and more emotional over the past six decades, a new linguistic study finds.
Researchers analyzed the oral language of 19 candidates who ran for president in elections from 1960 to 2024, using debate transcripts rather than prepared speeches or social media posts as their source. They tracked sentence length, vocabulary complexity, and the balance of emotional versus logical language across that span. The results show a steady drop in average sentence length, a decline in the use of complex terms, and a rise in emotional tone paired with a fall in logical, rational argument. The study also asks whether Trump's language stands out as unusually poor and whether specific stylistic quirks belong to a single president, though the published abstract does not spell out those answers.
The finding gives some data to a complaint pundits have made for years: debate rhetoric is shrinking into sound bites and leaning harder on feeling than reasoning. That matters because unscripted debate speech, unlike a polished stump speech, is one of the few places voters see how a candidate actually thinks on their feet - if the logic is thinning there, it is thinning in one of democracy's real stress tests.
Whether that counts as dumbing down or just adapting to a shorter attention span is a question this study raises but does not answer.