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Youna Kim

4 accepted papers

2025

When to Speak, When to Abstain: Contrastive Decoding with Abstention

ACL 2025long

Large Language Models (LLMs) demonstrate exceptional performance across diverse tasks by leveraging pre-trained (i.e., parametric) and external (i.e., contextual) knowledge. While substantial efforts have been made to enhance the utilization of both forms of knowledge, situations in which models lac…

Cited by 0SourcePDFScholar
2024

Adaptive Contrastive Decoding in Retrieval-Augmented Generation for Handling Noisy Contexts

EMNLP 2024finding

When using large language models (LLMs) in knowledge-intensive tasks, such as open-domain question answering, external context can bridge the gap between external knowledge and the LLMs’ parametric knowledge.Recent research has been developed to amplify contextual knowledge over the parametric knowl…

2024

Aligning Language Models to Explicitly Handle Ambiguity

EMNLP 2024main

In interactions between users and language model agents, user utterances frequently exhibit ellipsis (omission of words or phrases) or imprecision (lack of exactness) to prioritize efficiency. This can lead to varying interpretations of the same input based on different assumptions or background kno…

2023

CELDA: Leveraging Black-box Language Model as Enhanced Classifier without Labels

ACL 2023long

Utilizing language models (LMs) without internal access is becoming an attractive paradigm in the field of NLP as many cutting-edge LMs are released through APIs and boast a massive scale. The de-facto method in this type of black-box scenario is known as prompting, which has shown progressive perfo…