Yu Hou


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ACQUIRED: A Dataset for Answering Counterfactual Questions In Real-Life Videos
Te-Lin Wu | Zi-Yi Dou | Qingyuan Hu | Yu Hou | Nischal Chandra | Marjorie Freedman | Ralph Weischedel | Nanyun Peng
Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing

Multimodal counterfactual reasoning is a vital yet challenging ability for AI systems. It involves predicting the outcomes of hypothetical circumstances based on vision and language inputs, which enables AI models to learn from failures and explore hypothetical scenarios. Despite its importance, there are only a few datasets targeting the counterfactual reasoning abilities of multimodal models. Among them, they only cover reasoning over synthetic environments or specific types of events (e.g. traffic collisions), making them hard to reliably benchmark the model generalization ability in diverse real-world scenarios and reasoning dimensions. To overcome these limitations, we develop a video question answering dataset, ACQUIRED: it consists of 3.9K annotated videos, encompassing a wide range of event types and incorporating both first and third-person viewpoints, which ensures a focus on real-world diversity. In addition, each video is annotated with questions that span three distinct dimensions of reasoning, including physical, social, and temporal, which can comprehensively evaluate the model counterfactual abilities along multiple aspects. We benchmark our dataset against several state-of-the-art language-only and multimodal models and experimental results demonstrate a significant performance gap (>13%) between models and humans. The findings suggest that multimodal counterfactual reasoning remains an open challenge and ACQUIRED is a comprehensive and reliable benchmark for inspiring future research in this direction.


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On Measures of Biases and Harms in NLP
Sunipa Dev | Emily Sheng | Jieyu Zhao | Aubrie Amstutz | Jiao Sun | Yu Hou | Mattie Sanseverino | Jiin Kim | Akihiro Nishi | Nanyun Peng | Kai-Wei Chang
Findings of the Association for Computational Linguistics: AACL-IJCNLP 2022

Recent studies show that Natural Language Processing (NLP) technologies propagate societal biases about demographic groups associated with attributes such as gender, race, and nationality. To create interventions and mitigate these biases and associated harms, it is vital to be able to detect and measure such biases. While existing works propose bias evaluation and mitigation methods for various tasks, there remains a need to cohesively understand the biases and the specific harms they measure, and how different measures compare with each other. To address this gap, this work presents a practical framework of harms and a series of questions that practitioners can answer to guide the development of bias measures. As a validation of our framework and documentation questions, we also present several case studies of how existing bias measures in NLP—both intrinsic measures of bias in representations and extrinsic measures of bias of downstream applications—can be aligned with different harms and how our proposed documentation questions facilitates more holistic understanding of what bias measures are measuring.


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COM2SENSE: A Commonsense Reasoning Benchmark with Complementary Sentences
Shikhar Singh | Nuan Wen | Yu Hou | Pegah Alipoormolabashi | Te-lin Wu | Xuezhe Ma | Nanyun Peng
Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021