SynBullying: A Multi-LLM Synthetic Conversational Dataset for Cyberbullying Detection

Arefeh Kazemi, Hamza Qadeer, Joachim Wagner, Hossein Hosseini, Sri Balaaji Natarajan Kalaivendan, Brian Davis


Abstract
We introduce SynBullying, a synthetic multi-LLM conversational dataset for studying and detecting cyberbullying (CB). SynBullying provides a scalable and ethically safe alternative to human data collection by leveraging large language models (LLMs) to simulate realistic bullying interactions. The dataset offers (i) conversational structure, capturing multi-turn exchanges rather than isolated posts; (ii) context-aware annotations, where harmfulness is assessed within the conversational flow considering context, intent, and discourse dynamics; and (iii) fine-grained labeling, covering various CB categories for detailed linguistic and behavioral analysis. We evaluate SynBullying across five dimensions, including conversational structure, lexical patterns, sentiment/toxicity, role dynamics, harm intensity, and CB-type distribution. We further examine its utility by testing its performance as standalone training data and as an augmentation source for CB classification.
Anthology ID:
2026.lrec-main.578
Volume:
Proceedings of the Fifteenth Language Resources and Evaluation Conference
Month:
May
Year:
2026
Address:
Palma de Mallorca, Spain
Editors:
Stelios Piperidis, Núria Bel, Henk van den Heuvel, Nancy Ide, Simon Krek, Antonio Toral
Venue:
LREC
SIG:
Publisher:
ELRA Language Resource Association
Note:
Pages:
7292–7306
Language:
URL:
https://preview.aclanthology.org/ingest-lrec/2026.lrec-main.578/
DOI:
Bibkey:
Cite (ACL):
Arefeh Kazemi, Hamza Qadeer, Joachim Wagner, Hossein Hosseini, Sri Balaaji Natarajan Kalaivendan, and Brian Davis. 2026. SynBullying: A Multi-LLM Synthetic Conversational Dataset for Cyberbullying Detection. International Conference on Language Resources and Evaluation, main:7292–7306.
Cite (Informal):
SynBullying: A Multi-LLM Synthetic Conversational Dataset for Cyberbullying Detection (Kazemi et al., LREC 2026)
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https://preview.aclanthology.org/ingest-lrec/2026.lrec-main.578.pdf