---
title: "Responsible AI for Test Equity and Quality: The Duolingo English"
description: "Using the Duolingo English Test (DET), a high-stakes, computer-adaptive English proficiency exam, as a case study, the… 77 references."
authors: ["Jill Burstein", "Geoffrey T. LaFlair", "Kevin Yancey", "Alina A. von Davier", "Ravit Dotan"]
year: 2024
venue: "arXiv:2409.07476"
source: "https://arxiv.org/abs/2409.07476"
doi: "10.48550/arxiv.2409.07476"
arxiv: "2409.07476"
licence: "CC BY 4.0 (arXiv)"
licence_url: "http://creativecommons.org/licenses/by/4.0/"
summary_licence: "Elamur Cosmic License"
canonical: "https://research.elamur.ai/free/en/papers/burstein-2024-responsible-ai-test-equity-quality/"
---
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# Responsible AI for Test Equity and Quality: The Duolingo English Test as a Case Study

**Authors:** [Jill Burstein](https://md.research.elamur.ai/free/en/authors/jill-burstein/), Geoffrey T. LaFlair, Kevin Yancey, Alina A. von Davier and Ravit Dotan · **Year:** 2024 · **Venue:** arXiv:2409.07476 · **Licence:** [CC BY 4.0 (arXiv)](http://creativecommons.org/licenses/by/4.0/)

**Links:** [Publisher's page](https://arxiv.org/abs/2409.07476) · [PDF](https://arxiv.org/pdf/2409.07476) · [DOI 10.48550/arxiv.2409.07476](https://doi.org/10.48550/arxiv.2409.07476) · [arXiv 2409.07476](https://arxiv.org/abs/2409.07476) · [OpenAlex](https://openalex.org/W4403662745)

**Citations:** 6 citations (OpenAlex, 2026-10-14)

## Summary
This chapter addresses a gap: older test-validity and fairness frameworks were designed for paper or early computer tests. They say little about the new risks of AI-driven assessment, such as biased generated items, AI literacy of test developers, or the carbon cost of LLMs. Using the Duolingo English Test (DET), a high-stakes, computer-adaptive English proficiency exam, as a case study, the authors set out the four pillars of its Responsible AI (RAI) framework:
- Reliability, together with validity
- Fairness
- Security, together with privacy
- Transparency, together with accountability

They describe how the standards were built: a literature review of AI ethics principles, a review of assessment standards and guidelines, and consultation with internal and external experts. They then check the standards against the domain-agnostic NIST AI RMF and show concrete practices for each standard. One example is human-in-the-loop review of generated items, labelling, and proctoring. The contribution is not an experiment but a worked template. It shows how abstract ethics principles become auditable practices that protect score interpretation. The authors also openly list gaps the standards do not yet cover.

## Key points
- The DET uses AI in three areas:
  - test design, through automated item generation;
  - measurement, through automated scoring of writing and speaking;
  - security, through plagiarism detection.
- AI also powers a free practice test that gives an instant score estimate.
- Validity is framed through the argument-based chain of inferences of Kane and Chapelle et al.: domain definition, evaluation, generalization, explanation, extrapolation, and utilization.
- The four DET RAI standards are mapped onto the trustworthiness characteristics of the NIST AI RMF (NIST, 2023). They are also checked against AERA/APA/NCME (2014), OECD, ITC-ATP, and US Department of Education guidance.
- New scoring models and new items need an evidence document (ECP) covering validity, reliability, and fairness before launch. Several senior assessment and AI experts must approve it.
- Acknowledged limitations:
  - GPT-4o-era risks, such as deep fakes;
  - possible bias in the plagiarism detectors themselves;
  - no coverage yet of environmental and labour impacts.
- The authors estimate that replacing DET sessions with in-person tests would add tens of millions of km of travel per year.

## Interesting ideas
- Nothing ships without a written evidence dossier on accuracy, consistency, and fairness, signed off by several reviewers; this turns quality claims into a reviewable artifact.
- Validity is argued as a chain of separate inferences (task covers the domain, score reflects ability, score is stable, and so on), so a weak link can be located precisely.
- Humans are placed at specific decision points (reviewing generated items, labelling training data, confirming automatic flags) rather than everywhere, which keeps oversight cheap but targeted.
- Fairness is treated as a theme that cuts across all standards, so that bias in auxiliary tools such as detectors is not overlooked.
- A domain-specific rule set is cross-checked against a general framework to find missing coverage.

## For Mova

How these ideas could serve Mova, our small open language model — its files, stages and tests:

- **I1** (learn): Every new perceptron or gparse model, or new repair-rule set, could ship with a release record of LAS on held-out treebanks, negative-control results, and per-genre breakdowns, reviewed before replacing the old one.
- **I2** (answer): School-test and fable-QA evaluation could be organised as such a chain, checking separately that the questions cover the skill, that correct answers come from real comprehension, and that results hold on new texts.
- **I3** (back): Generated text from the graph → text path could be sampled at fixed checkpoints for human or strong-LLM review, with only flagged outputs escalated.
- **I4** (tree): Parser and conversion quality could be reported per dialect, register, and genre at every stage, not only at final evaluation, so systematic weaknesses on non-standard English surface early.
- **I5** (learn): Mova's own evaluation checklist could be mapped against a general AI risk framework like NIST AI RMF to spot unaddressed areas, such as data provenance or explainability gaps in a stage.

*Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.*

## Institutions

- [Duolingo](https://md.research.elamur.ai/free/en/companies/duolingo/) — Company, Pittsburgh, United States · 2 works · 437 citations

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🧭 Topics (1): [English](https://md.research.elamur.ai/free/en/topics/english/) · 2,263 works

## Cite

Cite as: Jill Burstein, Geoffrey T. LaFlair, Kevin Yancey, Alina A. von Davier and Ravit Dotan. 2024. Responsible AI for Test Equity and Quality: The Duolingo English Test as a Case Study. arXiv:2409.07476.

The paper itself, not this page. BibTeX from the library's record of the work.

```bibtex
@misc{burstein2024responsible,
  title = {{Responsible AI for Test Equity and Quality: The Duolingo English Test as a Case Study}},
  author = {Jill Burstein, Geoffrey T. LaFlair, Kevin Yancey, Alina A. {von Davier} and Ravit Dotan},
  year = {2024},
  doi = {10.48550/arxiv.2409.07476},
  eprint = {2409.07476},
  archivePrefix = {arXiv},
  url = {https://doi.org/10.48550/arxiv.2409.07476}
}
```

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*Updated 1 November 2026*
