Papers by Wuttikorn Ponwitayarat
SEA-BED: How Do Embedding Models Represent Southeast Asian Languages? (2026.acl-long)
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Wuttikorn Ponwitayarat, Peerat Limkonchotiwat, Raymond Ng, Jann Railey Montalan, Thura Aung, Jian Gang Ngui, Yosephine Susanto, William Chandra Tjhi, Panuthep Tasawong, Erik Cambria, Ekapol Chuangsuwanich, Sarana Nutanong
| Challenge: | SEA-BED examines how multilingual text embeddings perform across tasks and languages . performance gaps arise from data coverage, training objectives, and architectural design, authors say . |
| Approach: | They propose a large-scale benchmark covering 10 SEA languages and diverse embedding tasks. |
| Outcome: | The proposed model performs poorly across languages and tasks, but language-task analyses reveal inconsistencies . the results suggest that performance gaps arise from limitations in data coverage, training objectives, and architectural design. |
Mitigating Spurious Correlation in Natural Language Understanding with Counterfactual Inference (2022.emnlp-main)
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Can Udomcharoenchaikit, Wuttikorn Ponwitayarat, Patomporn Payoungkhamdee, Kanruethai Masuk, Weerayut Buaphet, Ekapol Chuangsuwanich, Sarana Nutanong
| Challenge: | Existing approaches to debias NLU models rely on superficial patterns to produce correct predictions . lexical overlap and annotation artifacts can be used to make shortcuts . |
| Approach: | They propose a causal analysis framework to help debias NLU models by defining causal relationships and utilizing counterfactual inference to mitigate bias. |
| Outcome: | The proposed framework can improve robustness across three NLU tasks while maintaining high in-distribution performance. |
McCrolin: Multi-consistency Cross-lingual Training for Retrieval Question Answering (2024.findings-emnlp)
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Peerat Limkonchotiwat, Wuttikorn Ponwitayarat, Lalita Lowphansirikul, Potsawee Manakul, Can Udomcharoenchaikit, Ekapol Chuangsuwanich, Sarana Nutanong
| Challenge: | Existing approaches struggle with consistency across multiple languages and multi-size input scenarios. |
| Approach: | They propose a cross-lingual training framework that leverages multi-task learning to enhance cross-linguistic consistency and ranking stability. |
| Outcome: | The proposed training framework outperforms competitors on various input sizes and architectures. |
Space Decomposition for Sentence Embedding (2024.findings-acl)
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| Challenge: | Existing methods to measure sentence pair similarity are based on a continuous semantic textual similarity scale . however, the score in the range [4,5] indicates an upper-range sample, while the rest are lower-range samples. |
| Approach: | They propose a method to decompose sentences into embedding space space . they use a mixture of specialized projectors to distinguish and rank upper-range and lower-range samples . |
| Outcome: | The proposed method outperforms existing methods on STS and zero-shot benchmarks while reducing overlap between upper-range and lower-range classes. |
ConGen: Unsupervised Control and Generalization Distillation For Sentence Representation (2022.findings-emnlp)
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Peerat Limkonchotiwat, Wuttikorn Ponwitayarat, Lalita Lowphansirikul, Can Udomcharoenchaikit, Ekapol Chuangsuwanich, Sarana Nutanong
| Challenge: | Sentence representations are essential in many NLP tasks operating at the sentence level. |
| Approach: | They propose an unsupervised sentence representation method to reduce the supervised-unsupervised performance gap for smaller models. |
| Outcome: | The proposed method outperforms supervised training on STS, text classification, and natural language inference tasks on smaller models. |
Typo-Robust Representation Learning for Dense Retrieval (2023.acl-short)
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Panuthep Tasawong, Wuttikorn Ponwitayarat, Peerat Limkonchotiwat, Can Udomcharoenchaikit, Ekapol Chuangsuwanich, Sarana Nutanong
| Challenge: | Dense retrieval is a fundamental building block of information retrieval applications. |
| Approach: | They propose a method that aligns misspelled queries with their pristine counterparts to improve contrast between each query and its surrounding queries. |
| Outcome: | The proposed method outperforms the competitors in all cases with misspelled queries. |
CL-ReLKT: Cross-lingual Language Knowledge Transfer for Multilingual Retrieval Question Answering (2022.findings-naacl)
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Peerat Limkonchotiwat, Wuttikorn Ponwitayarat, Can Udomcharoenchaikit, Ekapol Chuangsuwanich, Sarana Nutanong
| Challenge: | Existing approaches to cross-lingual question answering use sentence embedding to map documents and questions in multiple languages . a novel cross-linguistic approach to cross language-retrieval question answering is proposed . our method outperforms competitors in 19 out of 21 settings of CL-ReQA . |
| Approach: | They propose a cross-lingual language knowledge transfer framework for cross-linguistic question answering . they use a multilingual sentence embedding technique to create a linguistic embeddable space . |
| Outcome: | The proposed method outperforms current state-of-the-art methods in 19 out of 21 settings of CL-ReQA. |