Papers by Kathleen Carley
Parameterized Convolutional Neural Networks for Aspect Level Sentiment Classification (D18-1)
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| Challenge: | Existing approaches to aspect level sentiment classification ignore aspect information, causing large error. |
| Approach: | They propose a parameterized convolutional neural network for aspect level sentiment classification . they incorporate aspect information into convolutionally-based neural networks . |
| Outcome: | The proposed model achieves excellent results on SemEval 2014 datasets. |
A Hierarchical Location Prediction Neural Network for Twitter User Geolocation (D19-1)
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| Challenge: | Existing methods to estimate user location ignore hierarchical structure among locations. |
| Approach: | They propose a hierarchical location prediction neural network for Twitter user geolocation that first predicts the home country for a user, then uses the country result to guide the city-level prediction. |
| Outcome: | The proposed model can achieve state-of-the-art results over three common benchmarks under different feature settings and greatly reduces the mean error distance. |
Syntax-Aware Aspect Level Sentiment Classification with Graph Attention Networks (D19-1)
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| Challenge: | Aspect level sentiment classification aims to identify the sentiment expressed towards an aspect given a context sentence. |
| Approach: | They propose a target-dependent graph attention network for aspect level sentiment classification . it explicitly utilizes the dependency relationship among words to propagate sentiment features . they show that using BERT representations further substantially boosts the performance . |
| Outcome: | The proposed method outperforms baselines with GloVe embeddings and improves with BERT representations. |
Tree LSTMs with Convolution Units to Predict Stance and Rumor Veracity in Social Media Conversations (P19-1)
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| Challenge: | Existing approaches to learn from social-media conversations have been proposed to identify and contain fake news shared on social media platforms. |
| Approach: | They propose to represent social-media conversations as binarized constituency trees that allows comparing features in source-posts and their replies effectively. |
| Outcome: | The proposed models outperform the current best model by 12% and 15% on F1-macro for rumor-veracity classification and stance classification tasks respectively. |
A Weakly Supervised Classifier and Dataset of White Supremacist Language (2023.acl-short)
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| Challenge: | Existing studies on white supremacist language have focused on specific hateful ideologies, but little attention has been given to specific hate speech. |
| Approach: | They propose a weakly supervised classifier for detecting white supremacist language . they use large datasets of white supremacy domains paired with neutral and anti-racist data from similar domains to train the classifiers. |
| Outcome: | The proposed classifiers outperform previous studies on white supremacist classification on unseen datasets and find strong generalization performance for models with weakly annotated data. |