Papers by Yossi Matias
Learning and Evaluating a Differentially Private Pre-trained Language Model (2021.findings-emnlp)
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Shlomo Hoory, Amir Feder, Avichai Tendler, Sofia Erell, Alon Peled-Cohen, Itay Laish, Hootan Nakhost, Uri Stemmer, Ayelet Benjamini, Avinatan Hassidim, Yossi Matias
| Challenge: | Contextual language models have improved performance but can lead to information leakage . |
| Approach: | They propose a differentially-private word-piece algorithm that allows training a tailored domain-specific vocabulary while maintaining privacy. |
| Outcome: | The proposed model can guarantee privacy while maintaining good model performance. |
Audio De-identification - a New Entity Recognition Task (N19-2)
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Ido Cohn, Itay Laish, Genady Beryozkin, Gang Li, Izhak Shafran, Idan Szpektor, Tzvika Hartman, Avinatan Hassidim, Yossi Matias
| Challenge: | Named Entity Recognition (NER) is an important step in de-identification (de-ID) of medical records, many of which are recorded conversations between a patient and a doctor. |
| Approach: | They propose to use Named Entity Recognition (NER) to detect audio spans with entity mentions in medical records and then use it to evaluate the results. |
| Outcome: | The proposed pipeline is based on a large labeled segment of the Switchboard and Fisher audio datasets and compares it with a benchmark. |
Breaking the Language Barrier: Can Direct Inference Outperform Pre-Translation in Multilingual LLM Applications? (2024.naacl-short)
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Yotam Intrator, Matan Halfon, Roman Goldenberg, Reut Tsarfaty, Matan Eyal, Ehud Rivlin, Yossi Matias, Natalia Aizenberg
| Challenge: | Existing studies have focused on pre-translation, but there is still need for it . authors say that it is not universally necessary to translate large language models . |
| Approach: | They re-evaluate the need for pre-translation in the context of PaLM2 models . authors found that PaLM2-L consistently outperforms pre-translated in 94 out of 108 languages . |
| Outcome: | The proposed model outperforms pre-translation in 94 out of 108 languages and 6 benchmarks . authors argue that pre-translated inputs can be used to improve performance . |
TRUE: Re-evaluating Factual Consistency Evaluation (2022.naacl-main)
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Or Honovich, Roee Aharoni, Jonathan Herzig, Hagai Taitelbaum, Doron Kukliansy, Vered Cohen, Thomas Scialom, Idan Szpektor, Avinatan Hassidim, Yossi Matias
| Challenge: | Grounded text generation systems often generate factual inconsistencies, hindering their real-world applicability. |
| Approach: | They propose a method to assess factual consistency metrics on standardized texts . they recommend NLI and question generation-and-answering-based methods as starting points . |
| Outcome: | The proposed method is more actionable and interpretable than previous methods. |
Location Not Found: Exposing Implicit Local and Global Biases in Multilingual LLMs (2026.acl-long)
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Guy Mor-Lan, Omer Goldman, Matan Eyal, Adi Mayrav Gilady, Sivan Eiger, Idan Szpektor, Avinatan Hassidim, Yossi Matias, Reut Tsarfaty
| Challenge: | Multilingual large language models have minimized the fluency gap between languages, but they are exposed to the risk of biases as knowledge and norms may propagate across languages. |
| Approach: | They propose a test set with 2,156 questions in 12 languages to quantify models' biases . they show a global bias towards answers relevant to the US-locale . |
| Outcome: | The proposed model can answer locale-ambiguous questions in 12 languages. |