http://www.theguardian.com/world/interactive/2013/feb/12/state-of-the-union-reading-level
The state of our union is
dumber:
How the linguistic standard of the presidential address has declined
Using the Flesch-Kincaid readability test the Guardian has tracked the reading level of every State of the Union
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http://www.vox.com/xpress/2014/10/13/6969089/presidential-speeches-flesch-kincaid
Today's presidential speeches use simpler language than past ones
Over at Vocativ, EJ Fox, Mike Spies, and Matan Gilat have a fascinating analysis of how the type of language used in presidential speeches has changed over time. They collected the text of over 600 presidential speeches starting with George Washington, and used the Flesch-Kincaid readability test to rate the complexity of each speech's language. Each speech got a grade level rating a rating of "four" is a speech a fourth-grader could understand, while "15" would be a college graduate, and "21" a PhD student. Overall, the authors found a marked decline in complexity over the past two centuries: