Papers by Ariel Gera
Debatable Intelligence: Benchmarking LLM Judges via Debate Speech Evaluation (2025.emnlp-main)
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| Challenge: | Evaluating debate speeches requires a deep understanding of arguments at multiple levels. |
| Approach: | They propose a benchmark task for LLM judges based on annotated debate speeches . they analyze the judgment capabilities and behavior of frontier LLMs . |
| Outcome: | The proposed task requires a comprehensive understanding of argumentation and its arguments. |
Efficient Benchmarking (of Language Models) (2024.naacl-long)
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Yotam Perlitz, Elron Bandel, Ariel Gera, Ofir Arviv, Liat Ein-Dor, Eyal Shnarch, Noam Slonim, Michal Shmueli-Scheuer, Leshem Choshen
| Challenge: | Efficient Benchmarking is a method for reducing computation costs of LM evaluation without compromising reliability. |
| Approach: | They propose to reduce the computation costs of LM evaluation without compromising reliability by using a new measure - Decision Impact on Reliability. |
| Outcome: | The proposed benchmarks reduce computation costs by x100 or more, while maintaining reliability. |
Cluster & Tune: Boost Cold Start Performance in Text Classification (2022.acl-long)
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| Challenge: | Existing methods to fine-tune pre-trained models for text classification are poor in practice. |
| Approach: | They propose to add an intermediate unsupervised classification task between pre-training and fine-tuning phases to boost performance of pre-trained models. |
| Outcome: | The proposed method improves performance on topical classification tasks when labeled data is scarce. |
Label Sleuth: From Unlabeled Text to a Classifier in a Few Hours (2022.emnlp-demos)
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Eyal Shnarch, Alon Halfon, Ariel Gera, Marina Danilevsky, Yannis Katsis, Leshem Choshen, Martin Santillan Cooper, Dina Epelboim, Zheng Zhang, Dakuo Wang
| Challenge: | Label Sleuth is an open source system for labeling and creating text classifiers which does not require coding skills nor machine learning knowledge. |
| Approach: | *Label Sleuth* is an open source system for labeling and creating text classifiers which does not require coding skills nor machine learning knowledge. |
| Outcome: | *Label Sleuth* is an open source system for labeling and creating text classifiers. |
A Dataset of General-Purpose Rebuttal (D19-1)
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Matan Orbach, Yonatan Bilu, Ariel Gera, Yoav Kantor, Lena Dankin, Tamar Lavee, Lili Kotlerman, Shachar Mirkin, Michal Jacovi, Ranit Aharonov, Noam Slonim
| Challenge: | a key element in argumentation is rebuttal, the ability to contest an argument by presenting a counter-argument. |
| Approach: | They propose a method based on general rebuttal arguments to produce a critical response to a long argumentative text. |
| Outcome: | The proposed method overcomes the need for topic-specific arguments to be provided . it allows creating responses beyond the scope of topics for which specific arguments are available . |
Financial Event Extraction Using Wikipedia-Based Weak Supervision (D19-51)
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Liat Ein-Dor, Ariel Gera, Orith Toledo-Ronen, Alon Halfon, Benjamin Sznajder, Lena Dankin, Yonatan Bilu, Yoav Katz, Noam Slonim
| Challenge: | Existing methods for detecting financial and economic events from text have relied on a knowledge-base of financial events, or corresponding financial figures. |
| Approach: | They propose to use Wikipedia sections to extract weak labels for sentences describing economic events from text. |
| Outcome: | The proposed method can extract weak labels for sentences describing economic events from Wikipedia sentences. |
Unitxt: Flexible, Shareable and Reusable Data Preparation and Evaluation for Generative AI (2024.naacl-demo)
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Elron Bandel, Yotam Perlitz, Elad Venezian, Roni Friedman, Ofir Arviv, Matan Orbach, Shachar Don-Yehiya, Dafna Sheinwald, Ariel Gera, Leshem Choshen, Michal Shmueli-Scheuer, Yoav Katz
| Challenge: | Textual data processing pipelines are tailored to specific datasets, task and model combinations. |
| Approach: | They propose a library for customizable textual data preparation and evaluation tailored to generative language models. |
| Outcome: | Unitxt is a library for customizable textual data preparation and evaluation tailored to generative language models. |
Argument Invention from First Principles (P19-1)
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Yonatan Bilu, Ariel Gera, Daniel Hershcovich, Benjamin Sznajder, Dan Lahav, Guy Moshkowich, Anael Malet, Assaf Gavron, Noam Slonim
| Challenge: | Argument Invention is a task that is often referred to as a natural way of inventing arguments, but has not been formalized in the context of NLP. |
| Approach: | They propose to define a taxonomy of recurring arguments and to automatically identify which of them are relevant to the topic. |
| Outcome: | The proposed taxonomy is coherent, covers the relevant topics and coincides with what debaters actually argue in their speeches, and facilitates automatic argument invention for new topics. |
JuStRank: Benchmarking LLM Judges for System Ranking (2025.acl-long)
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| Challenge: | Recent work has focused on instance-based evaluation of LLM judges, where a judge is evaluated over a set of responses, or response pairs, while being agnostic to their source systems. |
| Approach: | They propose to validate the quality of the LLM judge itself by comparing system scores to a human-based ranking. |
| Outcome: | The proposed model fails to validate the quality of the judge itself, ignoring critical factors affecting system-level ranking, such as a judge’s positive or negative bias towards certain systems. |
Active Learning for Natural Language Generation (2023.emnlp-main)
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| Challenge: | Existing approaches to NLG are limited by the lack of annotated data. |
| Approach: | They propose to use active learning to reduce the cost of manual annotation to improve annotation efficiency by selecting the most informative examples to label. |
| Outcome: | The proposed approach surpasses baseline of random example selection in some cases but not in others. |
Zero-Shot Text Classification with Self-Training (2022.emnlp-main)
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| Challenge: | Recent advances in large pretrained language models have increased attention to zero-shot text classification. |
| Approach: | They propose a plug-and-play method to bridge this gap by requiring only class names along with an unlabeled dataset. |
| Outcome: | The proposed model can be trained on a natural language inference dataset and performs on dozens of unseen tasks without the need for domain expertise or trial and error. |
Navigating the Modern Evaluation Landscape: Considerations in Benchmarks and Frameworks for Large Language Models (LLMs) (2024.lrec-tutorials)
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| Challenge: | General-purpose Language Models have changed the world of Natural Language Processing, if not the world itself. |
| Approach: | This tutorial will lay the foundations and explain the basics of evaluation and compare traditional methods to newly developed methods. |
| Outcome: | The tutorial assumes little familiarity with metrics, datasets, prompts and benchmarks . it will compare traditional methods to newly developed methods . |
The Benefits of Bad Advice: Autocontrastive Decoding across Model Layers (2023.acl-long)
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Ariel Gera, Roni Friedman, Ofir Arviv, Chulaka Gunasekara, Benjamin Sznajder, Noam Slonim, Eyal Shnarch
| Challenge: | Existing approaches to apply language models to tasks that require intermediate representations are less informative. |
| Approach: | They propose a novel approach that utilizes the contrast between layers to improve text generation outputs. |
| Outcome: | The proposed approach mitigates degenerative behaviors of the model in open-ended generation, significantly improving the quality of generated texts. |
Label-Efficient Model Selection for Text Generation (2024.acl-long)
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| Challenge: | Model selection for a given task can entail extensive annotation of the quality of outputs of different models. |
| Approach: | They propose a model-agnostic method to make an informed decision between candidate text generation models based on preference annotations. |
| Outcome: | The proposed method reduces the required number of annotations by up to 75% while maintaining high evaluation reliability. |
Active Learning for BERT: An Empirical Study (2020.emnlp-main)
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Liat Ein-Dor, Alon Halfon, Ariel Gera, Eyal Shnarch, Lena Dankin, Leshem Choshen, Marina Danilevsky, Ranit Aharonov, Yoav Katz, Noam Slonim
| Challenge: | Existing approaches to deal with data scarcity are active learning (AL) and pre-trained models are not being considered. |
| Approach: | They propose to use active learning techniques to cope with data scarcity in binary text classification scenarios where the annotation budget is very small and the data is often skewed. |
| Outcome: | The proposed methods improve BERT performance in binary text classification scenarios where the annotation budget is very small and the data is often skewed. |