Methodology
This edition of the EF EPI is based on test data from more than 2,100,000 test takers around the world who took the EF Standard English Test (EF SET) or one of our English placement tests in 2021.
The EF Standard English Test (EF SET) The EF SET is an online, adaptive English test of reading and listening skills. It is a standardized, objectively scored test designed to classify test takers’ language abilities into one of the six levels established by the Common European Framework of Reference (CEFR). The EF SET is available to any Internet user for free.
For more information about the research and development of the EF SET, visit www.efset.org/about/.
EF EPI 2022 scores have been found to correlate strongly with TOEFL iBT 2020 scores (r=0.81) and IELTS Academic Test 2019 scores (r=0.75). These correlations show that, while these tests have different
designs and test taker profiles, they reveal similar trends in national English proficiency.

方法
此版本的 EF EPI 基于全球超过 2,100,000 名参加 EF 标准英语测试 (EF SET) 或 2021 年英语分级测试之一的考生的测试数据。
EF 标准英语测试 (EF SET) EF SET 是一项针对阅读和听力技能的在线自适应英语测试。 它是一项标准化、客观评分的测试，旨在将考生的语言能力分为欧洲共同参考框架 (CEFR) 建立的六个级别之一。 任何互联网用户都可以免费使用 EF SET。
有关 EF SET 研发的更多信息，请访问 www.efset.org/about/。
研究发现，EF EPI 2022 成绩与 TOEFL iBT 2020 成绩 (r=0.81) 和 IELTS 学术考试 2019 成绩 (r=0.75) 密切相关。 这些相关性表明，虽然这些测试有不同的
通过设计和考生资料，它们揭示了国家英语水平的相似趋势。