Papers by Jason Lee
MULTITuDE: Large-Scale Multilingual Machine-Generated Text Detection Benchmark (2023.emnlp-main)
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Dominik Macko, Robert Moro, Adaku Uchendu, Jason Lucas, Michiharu Yamashita, Matúš Pikuliak, Ivan Srba, Thai Le, Dongwon Lee, Jakub Simko, Maria Bielikova
| Challenge: | MULTITuDE benchmarks lack authentic and machine-generated text in languages other than English . defining characteristic of new generation of LLMs is increased quality of text . |
| Approach: | They propose a benchmarking dataset for multilingual machine-generated text detection that compares detectors with authentic and machine-generated texts in 11 languages. |
| Outcome: | The proposed dataset compares detectors with zero-shot and fine-tuned detectors in 11 languages. |
Pushing on Text Readability Assessment: A Transformer Meets Handcrafted Linguistic Features (2021.emnlp-main)
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| Challenge: | ML models with handcrafted features are linguistically explainable, expandable, and competent against the modern neural models. |
| Approach: | They propose to combine traditional ML models with ML transformers to improve readability assessment by 99% accuracy. |
| Outcome: | The proposed model achieves state-of-the-art (SOTA) accuracy on popular datasets. |
When is a Language Process a Language Model? (2024.findings-acl)
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| Challenge: | In some pathological situations, such a stochastic process may "leak" probability mass onto the set of infinite strings. |
| Approach: | They propose to view a language model as a discrete stochastic process X t : t = = t + . |
| Outcome: | The proposed conditions of tightness are generalized to language models and the literature. |
UniSumEval: Towards Unified, Fine-grained, Multi-dimensional Summarization Evaluation for LLMs (2024.findings-emnlp)
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| Challenge: | Existing benchmarks for summarization quality evaluation lack diverse input scenarios, focus on narrowly defined dimensions, and struggle with subjective and coarse-grained annotation schemes. |
| Approach: | They propose to use AI to help human annotations and identifie potentially hallucinogenic input texts. |
| Outcome: | The proposed benchmarks improve on existing benchmarks in terms of input diversity, granularity of human annotations, and evaluation dimensions. |
An Evaluation Dataset for Intent Classification and Out-of-Scope Prediction (D19-1)
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Stefan Larson, Anish Mahendran, Joseph J. Peper, Christopher Clarke, Andrew Lee, Parker Hill, Jonathan K. Kummerfeld, Kevin Leach, Michael A. Laurenzano, Lingjia Tang, Jason Mars
| Challenge: | Task-oriented dialog systems need to know when a query falls outside their range of supported intents. |
| Approach: | They propose a dataset that includes queries that are out-of-scope and 150 intent classes over 10 domains. |
| Outcome: | The proposed dataset includes queries that are out-of-scope, i.e., queries that do not fall into any of the system’s supported intents. |
Iterative Refinement in the Continuous Space for Non-Autoregressive Neural Machine Translation (2020.emnlp-main)
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| Challenge: | Existing non-autoregressive inference procedures that refine in token space often require computational overhead. |
| Approach: | They propose an efficient inference procedure that iteratively refines translation purely in the continuous space using a latent variable instead of the latent variables. |
| Outcome: | The proposed procedure is twice as efficient and more effective than the existing EM-like inference procedure. |
REST: Retrieval-Based Speculative Decoding (2024.naacl-long)
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| Challenge: | Retrieval-based speculative decoding (REST) is a new language model generation algorithm . it uses existing knowledge to generate draft tokens, allowing for seamless integration and acceleration of any language model. |
| Approach: | They propose a new algorithm that uses a draft language model to generate tokens from existing knowledge. |
| Outcome: | The proposed method achieves a speedup of 1.62 to 2.36 on code or text generation. |
Outlier Detection for Improved Data Quality and Diversity in Dialog Systems (N19-1)
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Stefan Larson, Anish Mahendran, Andrew Lee, Jonathan K. Kummerfeld, Parker Hill, Michael A. Laurenzano, Johann Hauswald, Lingjia Tang, Jason Mars
| Challenge: | Existing methods to detect outliers in text have been neglected in NLP . outlier detection is a problem in dialog systems where text is often no more than a few sentences in length. |
| Approach: | They propose a technique that uses sentence embeddings to detect outliers in short texts using neural sentence embeds and distance-based outlier detection. |
| Outcome: | The proposed technique detects outliers in a corpus of short texts while generating highly diverse corpora that produce more robust intent classification and slot-filling models. |
A Pretrainer’s Guide to Training Data: Measuring the Effects of Data Age, Domain Coverage, Quality, & Toxicity (2024.naacl-long)
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Shayne Longpre, Gregory Yauney, Emily Reif, Katherine Lee, Adam Roberts, Barret Zoph, Denny Zhou, Jason Wei, Kevin Robinson, David Mimno, Daphne Ippolito
| Challenge: | a large number of pretraining data design practices are under-documented, authors say . authors: strong performance of modern language models depends on selfsupervised pretraining . |
| Approach: | They propose to pretrain models on data curated at different collection times . they find temporal shift between evaluation data and pretraining data leads to performance degradation . |
| Outcome: | The results validate, quantify, and expose many undocumented intuitions about text pretraining . authors say this practice has outperformed other models in the field . |
Fighting Fire with Fire: The Dual Role of LLMs in Crafting and Detecting Elusive Disinformation (2023.emnlp-main)
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| Challenge: | Recent ubiquity and disruptive impacts of large language models have raised concerns about their potential to be misused. |
| Approach: | They propose a strategy that leverages LLMs' generative and emergent reasoning capabilities to counter human-written and LLM-generated disinformation. |
| Outcome: | The proposed strategy synthesizes authentic and deceptive LLM-generated content through paraphrase-based and perturbation-based prefix-style prompts, respectively. |
Prompt-based Learning for Text Readability Assessment (2023.findings-eacl)
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| Challenge: | Using a pre-trained seq2seq model, we can discern which text is more difficult from two given texts (pairwise). |
| Approach: | They propose to adapt a pre-trained seq2seq model to discern which text is more difficult from two given texts (pairwise). |
| Outcome: | The proposed model can be adapted to discern which text is more difficult from two given texts (pairwise). |
Deterministic Non-Autoregressive Neural Sequence Modeling by Iterative Refinement (D18-1)
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| Challenge: | Despite its success, neural autoregressive modeling has its weakness in decoding, i.e., finding the most likely sequence. |
| Approach: | They propose a conditional non-autoregressive neural sequence model based on iterative refinement based upon latent variable models and conditional denoising autoencoders. |
| Outcome: | The proposed model significantly speeds up decoding while maintaining the generation quality comparable to the autoregressive counterpart. |
Countering Language Drift via Visual Grounding (D19-1)
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| Challenge: | Emergent multi-agent communication protocols are different from natural language . a long-standing goal of artificial intelligence research is to develop agents that can cooperate with other agents . |
| Approach: | They propose to use syntactic and semantic constraints to improve communication . they propose to combine these constraints with auxiliary training constraints to reduce language drift . |
| Outcome: | a new study shows that pre-trained agents retain English syntax while learning to convey intended meaning . the proposed training constraints can be used to mitigate language drift . |
Towards Multi-dimensional Evaluation of LLM Summarization across Domains and Languages (2025.acl-long)
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Hyangsuk Min, Yuho Lee, Minjeong Ban, Jiaqi Deng, Nicole Hee-Yeon Kim, Taewon Yun, Hang Su, Jason Cai, Hwanjun Song
| Challenge: | Existing evaluation frameworks for text summarization lack domain-specific assessment criteria and are predominantly English-centric. |
| Approach: | They propose a multi-dimensional, multi-domain evaluation of summarization in English and Chinese that incorporates specialized assessment criteria for each domain and leverages a debate system to enhance annotation quality. |
| Outcome: | The proposed evaluation framework provides a multi-dimensional, multi-domain evaluation of summarization in English and Chinese. |
Authorship Obfuscation in Multilingual Machine-Generated Text Detection (2024.findings-emnlp)
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Dominik Macko, Robert Moro, Adaku Uchendu, Ivan Srba, Jason Lucas, Michiharu Yamashita, Nafis Irtiza Tripto, Dongwon Lee, Jakub Simko, Maria Bielikova
| Challenge: | Recent advances in Language Modeling have birthed Large Language Models (LLMs), which exhibit significant improvements, including the ability to generate texts easily misconstrued as humanwritten. |
| Approach: | They compare authorship obfuscation methods against machine-generated text (MGT) in 11 languages and analyze their performance against 37 well-known AO methods. |
| Outcome: | The proposed methods can cause evasion of detection in all languages, with homoglyph attacks particularly successful. |
Learning to Summarize from LLM-generated Feedback (2025.naacl-long)
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| Challenge: | Developing effective text summarizers remains a challenge due to issues like unfaithful statements, key information omissions, and verbosity. |
| Approach: | They propose a large-scale dataset containing multi-dimensional feedback on LLM-generated summaries of varying quality across diverse domains to align them with human preferences for faithfulness, completeness, and conciseness. |
| Outcome: | The proposed model outperforms the 10x larger Llama3-70b-instruct in generating human-preferred summaries. |