Fig. 8: Evolution of unique adjective and adverb usage by the top 3 publishing countries.
From: Writing without borders: AI and cross-cultural convergence in academic writing quality

This figure presents the evolution of unique adjectives (sub-plot 1) and unique adverbs (sub-plot 2) commonly associated with AI-generated content in academic writing in the top three publishing countries—China, the United Kingdom, and the United States—from 2012 to 2024.