Plain Language in the US Gains Momentum: 1940–2015

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Abstract
Research problem: Interest in plain-language communication has been growing in many sectors of business and government, but knowledge about its development is scattered and in need of synthesis. Research questions: 1. How did plain language in the US evolve to gain acceptance by industry, government, and the public? 2. In what ways have advocates changed their vision of plain language? Literature review: My review identified a corpus of more than 100 publications relevant to the history of plain language from 1940 to 2015. Methodology: I evaluated the literature on plain language to identify milestones, events, and trends between 1940 and 2015. I focused on the evolution of plain language and on ways that practitioners altered their perspective of the field. Results: Between 1940 and 1970, plain language focused mainly on readability. During the 1970s, some practitioners began to employ usability testing. By the mid-1980s, there was a widespread sense that plain-language advocates had shifted priorities from readability to usability. Between 1980 and 2000, advocates broadened their vision—beyond word- and sentence-level concerns to include discourse-level issues, information design, and accessibility. Between 2000 and 2015, advocates continued to worry over their old questions (“Can people understand and use the content?”), but also asked, “Will people believe the content? Do they trust the message?” By 2015, plain language had gained significant momentum in business, government, medicine, and education. Conclusions: Plain language evolved over the past 75 years from a sentence-based activity focused on readability of paper documents to a whole-text-based activity, emphasizing evidence-based principles of writing and visual design for paper, multimedia, and electronic artifacts. Plain-language practitioners expanded their concerns from how people understand the content—the usability and accessibility of the content—to whether people trust the content. In addition to a narrative about the field's evolution, I offer a Timeline of Plain Language from 1940–2015, which chronicles the field's highlights. Together, the narrative and timeline offer a fairly comprehensive view of the current state of plain language and allow those with an interest to dig deeper.

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