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Despite growing interest in automated hate speech detection, most existing approaches overlook the linguistic diversity of online content. Multilingual instruction-tuned large language models such as LLaMA, Aya, Qwen, and BloomZ offer…

Computation and Language · Computer Science 2025-05-27 Faeze Ghorbanpour , Daryna Dementieva , Alexander Fraser

With the growing popularity of RAG, the capabilities of embedding models are gaining increasing attention. Embedding models are primarily trained through contrastive loss learning, with negative examples being a key component. Previous work…

Computation and Language · Computer Science 2024-08-30 Shiyu Li , Yang Tang , Shizhe Chen , Xi Chen

This work proposes a contextualised detection framework for implicitly hateful speech, implemented as a multi-agent system comprising a central Moderator Agent and dynamically constructed Community Agents representing specific demographic…

Computation and Language · Computer Science 2026-01-28 Ewelina Gajewska , Katarzyna Budzynska , Jarosław A Chudziak

With the ever-growing presence of social media platforms comes the increased spread of harmful content and the need for robust hate speech detection systems. Such systems easily overfit to specific targets and keywords, and evaluating them…

Computation and Language · Computer Science 2023-11-20 Maike Züfle , Verna Dankers , Ivan Titov

A prominent technique for self-supervised representation learning has been to contrast semantically similar and dissimilar pairs of samples. Without access to labels, dissimilar (negative) points are typically taken to be randomly sampled…

Machine Learning · Computer Science 2020-10-22 Ching-Yao Chuang , Joshua Robinson , Lin Yen-Chen , Antonio Torralba , Stefanie Jegelka

With the proliferation of social media, there has been a sharp increase in offensive content, particularly targeting vulnerable groups, exacerbating social problems such as hatred, racism, and sexism. Detecting offensive language use is…

Computation and Language · Computer Science 2023-12-05 Toygar Tanyel , Besher Alkurdi , Serkan Ayvaz

Contrastive learning (CL) methods effectively learn data representations in a self-supervision manner, where the encoder contrasts each positive sample over multiple negative samples via a one-vs-many softmax cross-entropy loss. By…

Machine Learning · Computer Science 2023-08-16 Huangjie Zheng , Xu Chen , Jiangchao Yao , Hongxia Yang , Chunyuan Li , Ya Zhang , Hao Zhang , Ivor Tsang , Jingren Zhou , Mingyuan Zhou

StyleGAN has shown strong potential for disentangled semantic control, thanks to its special design of multi-layer intermediate latent variables. However, existing semantic discovery methods on StyleGAN rely on manual selection of modified…

Computer Vision and Pattern Recognition · Computer Science 2022-12-15 Xinqi Zhu , Chang Xu , Dacheng Tao

Large Language Models (LLMs) have raised increasing concerns about their misuse in generating hate speech. Among all the efforts to address this issue, hate speech detectors play a crucial role. However, the effectiveness of different…

Cryptography and Security · Computer Science 2025-01-29 Xinyue Shen , Yixin Wu , Yiting Qu , Michael Backes , Savvas Zannettou , Yang Zhang

This paper introduces a novel multimodal framework for hate speech detection in deepfake audio, excelling even in zero-shot scenarios. Unlike previous approaches, our method uses contrastive learning to jointly align audio and text…

Sound · Computer Science 2025-06-11 Rishabh Ranjan , Likhith Ayinala , Mayank Vatsa , Richa Singh

Unsupervised sentence representation learning remains a critical challenge in modern natural language processing (NLP) research. Recently, contrastive learning techniques have achieved significant success in addressing this issue by…

Computation and Language · Computer Science 2024-11-20 Wenxiao Liu , Zihong Yang , Chaozhuo Li , Zijin Hong , Jianfeng Ma , Zhiquan Liu , Litian Zhang , Feiran Huang

We study whether large-scale unlabelled web data and LLM-based synthetic annotations can improve multilingual hate speech detection. Starting from texts crawled via OpenWebSearch.eu~(OWS) in four languages (English, German, Spanish,…

Computation and Language · Computer Science 2026-04-14 Dang H. Dang , Jelena Mitrovi , Michael Granitzer

Semi-supervised action recognition aims to improve spatio-temporal reasoning ability with a few labeled data in conjunction with a large amount of unlabeled data. Albeit recent advancements, existing powerful methods are still prone to…

Computer Vision and Pattern Recognition · Computer Science 2024-04-26 Yu Wang , Sanping Zhou , Kun Xia , Le Wang

Large Language Models (LLMs) are the cornerstone for many Natural Language Processing (NLP) tasks like sentiment analysis, document classification, named entity recognition, question answering, summarization, etc. LLMs are often trained on…

Computation and Language · Computer Science 2024-02-09 Christoph Tillmann , Aashka Trivedi , Bishwaranjan Bhattacharjee

Offensive language such as hate, abuse, and profanity (HAP) occurs in various content on the web. While previous work has mostly dealt with sentence level annotations, there have been a few recent attempts to identify offensive spans as…

Computation and Language · Computer Science 2023-12-19 Christoph Tillmann , Aashka Trivedi , Sara Rosenthal , Santosh Borse , Rong Zhang , Avirup Sil , Bishwaranjan Bhattacharjee

Supervised approaches generally rely on majority-based labels. However, it is hard to achieve high agreement among annotators in subjective tasks such as hate speech detection. Existing neural network models principally regard labels as…

Computation and Language · Computer Science 2023-01-11 Wenjie Yin , Vibhor Agarwal , Aiqi Jiang , Arkaitz Zubiaga , Nishanth Sastry

Metaphors play a significant role in our everyday communication, yet detecting them presents a challenge. Traditional methods often struggle with improper application of language rules and a tendency to overlook data sparsity. To address…

Computation and Language · Computer Science 2024-04-10 Kaidi Jia , Rongsheng Li

The automatic detection of hate speech online is an active research area in NLP. Most of the studies to date are based on social media datasets that contribute to the creation of hate speech detection models trained on them. However, data…

Computation and Language · Computer Science 2023-07-06 Dimosthenis Antypas , Jose Camacho-Collados

Neural network based speech recognition systems suffer from performance degradation due to accented speech, especially unfamiliar accents. In this paper, we study the supervised contrastive learning framework for accented speech…

Sound · Computer Science 2021-07-05 Tao Han , Hantao Huang , Ziang Yang , Wei Han

Automatic hate speech detection in online social networks is an important open problem in Natural Language Processing (NLP). Hate speech is a multidimensional issue, strongly dependant on language and cultural factors. Despite its…

Computation and Language · Computer Science 2021-05-03 Aymé Arango , Jorge Pérez , Barbara Poblete