MMSD2.0: Towards a Reliable Multi-modal Sarcasm Detection System
Summary
The paper argues that the standard multi-modal sarcasm benchmark, MMSD (Twitter text–image pairs, Cai et al., 2019), does not reliably measure multi-modal understanding. A text-only RoBERTa model beats the leading multi-modal system HKE, which suggests that models exploit textual shortcuts. The authors trace this to two flaws. First, hashtags and emoji tokens are distributed very unevenly between sarcastic and non-sarcastic posts. Second, any post lacking a tag like #sarcasm was automatically labeled negative, even though many such posts are sarcastic.
They release MMSD2.0, which strips hashtag and emoji words from the texts. It also has crowd workers relabel every originally negative example, with quality gated by a qualification test and an agreement check. Alongside the data, they propose multi-view CLIP, which builds on pre-trained CLIP. It combines evidence from a text view, an image view and a text–image interaction view, and it needs neither object detection nor graph construction. The authors report that it clearly outperforms earlier state-of-the-art baselines. The work matters because it shows that progress on the old benchmark may be inflated, and it offers a cleaner testbed with code and data on GitHub (JoeYing1019/MMSD2.0).
Key points
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Evidence of shortcut learning: the text-only RoBERTa outperforms the multi-modal HKE on the original MMSD by 6.6%.
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Hashtag and emoji imbalance: sarcastic samples average more than one hashtag word, while non-sarcastic ones average fewer than one. About 80.7% of emoji words occur in only one of the two classes.
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Relabeling procedure:
- All MMSD negatives, more than half the data, were re-annotated as Sarcasm, Not Sarcasm or Undecided.
- Three experts resolved the Undecided cases.
- Annotators had to reach 85% on a 100-sample onboarding test.
- A second-annotator check on 1,000 samples gave Cohen's Kappa of 0.811.
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Split sizes (positive/negative, MMSD → MMSD2.0):
Split Size MMSD MMSD2.0 Train 19,816 8,642/11,174 9,572/10,240 Validation 2,410 959/1,451 1,042/1,368 Test 2,409 959/1,450 1,037/1,372 MMSD2.0 has a more balanced class distribution.
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Stated limitation: MMSD2.0 inherits the scale and diversity of MMSD. The annotators were paid postgraduate students at Chinese universities.
Cited by
Cite
@inproceedings{qin2023mmsd2,
title = {{MMSD2.0: Towards a Reliable Multi-modal Sarcasm Detection System}},
author = {Qin, Libo and Huang, Shijue and Chen, Qiguang and Cai, Chenran and Zhang, Yudi and Liang, Bin and Che, Wanxiang and Xu, Ruifeng},
booktitle = {Findings of the Association for Computational Linguistics: ACL 2023},
year = {2023},
doi = {10.18653/v1/2023.findings-acl.689},
eprint = {2307.07135},
archivePrefix = {arXiv},
url = {https://doi.org/10.18653/v1/2023.findings-acl.689}
}References
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