### Recent Posts

1. [New research in Language Testing: Does test question order affect performance?](https://blog.englishtest.duolingo.com/language-test-section-ordering-research/)  
   *Ramsey L. Cardwell, Ph. D.*  
   *May 26, 2026*

2. [DET–TOEFL concordance: What TOEFL’s new 1–6 scale means for score requirements](https://blog.englishtest.duolingo.com/det-toefl-concordance-toefl-new-1-6-scale/)  
   *Ramsey L. Cardwell, Ph. D.*  
   *February 23, 2026*

3. [New research: Is the DET comparable to TOEFL and IELTS in predicting student success?](https://blog.englishtest.duolingo.com/new-research-duolingo-english-test-compared-to-toefl-ielts/)  
   *Ramsey L. Cardwell, Ph. D.*  
   *September 11, 2025*

4. [New research in CALICO: Are English tests keeping up with our digital world?](https://blog.englishtest.duolingo.com/new-research-in-calico-are-english-tests-keeping-up-with-our-digital-world/)  
   *Ramsey L. Cardwell, Ph. D.*  
   *September 8, 2025*

5. [How the DET Practice Test improves test-taker confidence and performance](https://blog.englishtest.duolingo.com/duolingo-unlimited-practice-test-study/)  
   *Ramsey L. Cardwell, Ph. D.*  
   *February 13, 2025*

6. [Why do language test scores expire?](https://blog.englishtest.duolingo.com/why-do-language-test-scores-expire/)  
   *Ramsey L. Cardwell, Ph. D.*  
   *January 13, 2025*

7. [How difficult is the Duolingo English Test?](https://blog.englishtest.duolingo.com/is-the-duolingo-english-test-hard/)  
   *Sophie Wodzak and Ramsey L. Cardwell, Ph. D.*  
   *June 14, 2021*