Characterizing the Entities in Harmful Memes: Who is the Hero, the Villain, the Victim?

• URL: http://arxiv.org/abs/2301.11219v2
• Date: Mon, 10 Apr 2023 20:07:38 GMT
• Title: Characterizing the Entities in Harmful Memes: Who is the Hero, the Villain, the Victim?
• Authors: Shivam Sharma, Atharva Kulkarni, Tharun Suresh, Himanshi Mathur, Preslav Nakov, Md. Shad Akhtar, Tanmoy Chakraborty
• Abstract summary: We aim to understand whether the meme glorifies, vilifies, or victimizes each entity it refers to. Our proposed model achieves an improvement of 4% over the best baseline and 1% over the best competing stand-alone submission.
• Score: 39.55435707149863
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Memes can sway people's opinions over social media as they combine visual and textual information in an easy-to-consume manner. Since memes instantly turn viral, it becomes crucial to infer their intent and potentially associated harmfulness to take timely measures as needed. A common problem associated with meme comprehension lies in detecting the entities referenced and characterizing the role of each of these entities. Here, we aim to understand whether the meme glorifies, vilifies, or victimizes each entity it refers to. To this end, we address the task of role identification of entities in harmful memes, i.e., detecting who is the 'hero', the 'villain', and the 'victim' in the meme, if any. We utilize HVVMemes - a memes dataset on US Politics and Covid-19 memes, released recently as part of the CONSTRAINT@ACL-2022 shared-task. It contains memes, entities referenced, and their associated roles: hero, villain, victim, and other. We further design VECTOR (Visual-semantic role dEteCToR), a robust multi-modal framework for the task, which integrates entity-based contextual information in the multi-modal representation and compare it to several standard unimodal (text-only or image-only) or multi-modal (image+text) models. Our experimental results show that our proposed model achieves an improvement of 4% over the best baseline and 1% over the best competing stand-alone submission from the shared-task. Besides divulging an extensive experimental setup with comparative analyses, we finally highlight the challenges encountered in addressing the complex task of semantic role labeling within memes.

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