Gitanjali Kumari


2024

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Unintended Bias Detection and Mitigation in Misogynous Memes
Gitanjali Kumari | Anubhav Sinha | Asif Ekbal
Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers)

Online sexism has become a concerning issue in recent years, especially conveyed through memes. Although this alarming phenomenon has triggered many studies from computational linguistic and natural language processing points of view, less effort has been spent analyzing if those misogyny detection models are affected by an unintended bias. Such biases can lead models to incorrectly label non-misogynous memes misogynous due to specific identity terms, perpetuating harmful stereotypes and reinforcing negative attitudes. This paper presents the first and most comprehensive approach to measure and mitigate unintentional bias in the misogynous memes detection model, aiming to develop effective strategies to counter their harmful impact. Our proposed model, the Contextualized Scene Graph-based Multimodal Network (CTXSGMNet), is an integrated architecture that combines VisualBERT, a CLIP-LSTM-based memory network, and an unbiased scene graph module with supervised contrastive loss, achieves state-of-the-art performance in mitigating unintentional bias in misogynous memes.Empirical evaluation, including both qualitative and quantitative analysis, demonstrates the effectiveness of our CTXSGMNet framework on the SemEval-2022 Task 5 (MAMI task) dataset, showcasing its promising performance in terms of Equity of Odds and F1 score. Additionally, we assess the generalizability of the proposed model by evaluating their performance on a few benchmark meme datasets, providing a comprehensive understanding of our approach’s efficacy across diverse datasets.

2023

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The Persuasive Memescape: Understanding Effectiveness and Societal Implications of Internet Memes
Gitanjali Kumari | Pranali Shinde | Asif Ekbal
Proceedings of the 13th International Joint Conference on Natural Language Processing and the 3rd Conference of the Asia-Pacific Chapter of the Association for Computational Linguistics (Volume 1: Long Papers)

2021

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Co-attention based Multimodal Factorized Bilinear Pooling for Internet Memes Analysis
Gitanjali Kumari | Amitava Das | Asif Ekbal
Proceedings of the 18th International Conference on Natural Language Processing (ICON)

Social media platforms like Facebook, Twitter, and Instagram have a significant impact on several aspects of society. Memes are a new type of social media communication found on social platforms. Even though memes are primarily used to distribute humorous content, certain memes propagate hate speech through dark humor. It is critical to properly analyze and filter out these toxic memes from social media. But the presence of sarcasm and humor in an implicit way analyzes memes more challenging. This paper proposes an end-to-end neural network architecture that learns the complex association between text and image of a meme. For this purpose, we use a recent SemEval-2020 Task-8 multimodal dataset. We proposed an end-to-end CNN-based deep neural network architecture with two sub-modules viz. (i)Co-attention based sub-module and (ii) Multimodal Factorized Bilinear Pooling(MFB) sub-module to represent the textual and visual features of a meme in a more fine-grained way. We demonstrated the effectiveness of our proposed work through extensive experiments. The experimental results show that our proposed model achieves a 36.81% macro F1-score, outperforming all the baseline models.