Publications

2025

Personas with Attitudes: Controlling LLMs for Diverse Data Annotation

Leon Frohling, Gianluca Demartini, Dennis Assenmacher

2025Proceedings of the The 9th Workshop on Online Abuse and Harms (WOAH)Association for Computational Linguisticspp. 468--481
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Fine-Tuning Large Language Models to Simulate German Voting Behaviour

Tobias Holtdirk, Dennis Assenmacher, Arnim Bleier, Claudia Wagner

2025OSF Preprints
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A Modular Taxonomy for Hate Speech Definitions and Its Impact on Zero-Shot LLM Classification Performance

Matteo Melis, Gabriella Lapesa, Dennis Assenmacher

2025Proceedings of the The 9th Workshop on Online Abuse and Harms (WOAH)Association for Computational Linguisticspp. 490--521
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2024

You Are a Bot!--Studying the Development of Bot Accusations on Twitter

Dennis Assenmacher, Leon Fröhling, Claudia Wagner

2024Proceedings of the International AAAI Conference on Web and Social MediaVol. 18pp. 113--125
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The Unseen Targets of Hate: A Systematic Review of Hateful Communication Datasets

Zehui Yu, Indira Sen, Dennis Assenmacher, Mattia Samory, Leon Fröhling, Christina Dahn, Debora Nozza, Claudia Wagner

2024Social Science Computer Review
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Sexism Detection on a Data Diet

Rabiraj Bandyopadhyay, Dennis Assenmacher, Jose M. Alonso-Moral, Claudia Wagner

2024Companion Publication of the 16th ACM Web Science ConferenceAssociation for Computing Machinerypp. 94–102
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Multilingual Bot Accusations: How Different Linguistic Contexts Shape Perceptions of Social Bots

Leon Fröhling, Xiaofei Li, Dennis Assenmacher

2024Proceedings of the 4th Workshop on Computational Linguistics for the Political and Social SciencesAssociation for Computational Lingustics
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AI-Generated Faces in the Real World: A Large-Scale Case Study of Twitter Profile Images

Jonas Ricker, Dennis Assenmacher, Thorsten Holz, Asja Fischer, Erwin Quiring

2024Proceedings of the 27th International Symposium on Research in Attacks, Intrusions and DefensesAssociation for Computing Machinerypp. 513–530
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A Systematic Review of the Effects of AI-Assisted Moderation on Individuals and Groups

Zehui Yu, Lukas Otto, Dennis Assenmacher, Claudia Wagner

2024Human-Machine CommunicationVol. 9No. 1pp. 10
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2023

The End of the Rehydration Era The Problem of Sharing Harmful Twitter Research Data

Dennis Assenmacher, Indira Sen, Leon Fröhling, Claudia Wagner

2023Workshop Proceedings of the International AAAI Conference on Web and Social MediaVol. 17pp. 1093--1101
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People Make Better Edits: Measuring the Efficacy of LLM-Generated Counterfactually Augmented Data for Harmful Language Detection

Indira Sen, Dennis Assenmacher, Mattia Samory, Isabelle Augenstein, Wil van der Aalst, Claudia Wagner

2023Proceedings of the 2023 Conference on Empirical Methods in Natural Language ProcessingAssociation for Computational Linguisticspp. 10480--10504
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Just Another Day on Twitter: A Complete 24 Hours of Twitter Data

Jürgen Pfeffer, Daniel Matter, Kokil Jaidka, Onur Varol, Afra Mashhadi, Jana Lasser, Dennis Assenmacher, Siqi Wu, Diyi Yang, Cornelia Brantner, Daniel M. Romero, Jahna Otterbacher, Carsten Schwemmer, Kenneth Joseph, David Garcia, Fred Morstatter

2023Proceedings of the International AAAI Conference on Web and Social MediaVol. 17No. 1pp. 1073-1081
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Invasion@ Ukraine: Providing and Describing a Twitter Streaming Dataset That Captures the Outbreak of War Between Russia and Ukraine in 2022

Janina Susanne Pohl, Simon Markmann, Dennis Assenmacher, Christian Grimme

2023Proceedings of the International AAAI Conference on Web and Social MediaVol. 17pp. 1093--1101
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2022

Textual One-Pass Stream Clustering with Automated Distance Threshold Adaption

Dennis Assenmacher, Heike Trautmann

2022Intelligent Information and Database Systems: 14th Asian Conference, ACIIDS 2022Springer-Verlagpp. 3–16
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Artificial Social Media Campaign Creation for Benchmarking and Challenging Detection Approaches

Janina Susanne Pohl, Dennis Assenmacher, Moritz Vincent Seiler, Heike Trautmann, Christian Grimme

2022Workshop Proceedings of the 16^th International Conference on Web and Social Media
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2021

RP-Mod & RP-Crowd: Moderator- and Crowd-Annotated German News Comment Datasets

Dennis Assenmacher, Marco Niemann, Kilian Muller, Moritz Seiler, Dennis Riehle, Heike Trautmann, Heike Trautmann

2021Proceedings of the Neural Information Processing Systems Track on Datasets and BenchmarksVol. 1
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Benchmarking Crisis in Social Media Analytics: A Solution for the Data-Sharing Problem

Dennis Assenmacher, Derek Weber, Mike Preuss, André Calero Valdez, Alison Bradshaw, Björn Ross, Stefano Cresci, Heike Trautmann, Frank Neumann, Christian Grimme

2021Social Science Computer Review
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2020

Towards Real-Time and Unsupervised Campaign Detection in Social Media

Dennis Assenmacher, Lena Adam, Heike Trautmann, Christian Grimme

2020FLAIRS 2020 - Proceedings of the 33rd International Florida Artificial Intelligence Research Society ConferenceAAAI Presspp. 303-306
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Demystifying Social Bots: On the Intelligence of Automated Social Media Actors

Dennis Assenmacher, Lena Clever, Lena Frischlich, Thorsten Quandt, Heike Trautmann, Christian Grimme

2020Social Media + Society
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Building an Integrated Comment Moderation System -- Towards a Semi-automatic Moderation Tool

Dennis M. Riehle, Marco Niemann, Jens Brunk, Dennis Assenmacher, Heike Trautmann, Jorg Becker

2020Social Computing and Social Media. Participation, User Experience, Consumer Experience, and Applications of Social ComputingSpringer International Publishingpp. 71--86
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Abusive Comments in Online Media and How to Fight Them

Marco Niemann, Jens Welsing, Dennis M Riehle, Jens Brunk, Dennis Assenmacher, Jörg Becker

2020Disinformation in Open Online MediaSpringer International Publishingpp. 122--137
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A Two-Phase Framework for Detecting Manipulation Campaigns in Social Media

Dennis Assenmacher, Lena Clever, Janina Susanne Pohl, Heike Trautmann, Christian Grimme

2020Social Computing and Social Media. Design, Ethics, User Behavior, and Social Network AnalysisSpringer International Publishingpp. 201--214
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2018

Changing Perspectives: Is It Sufficient to Detect Social Bots?

Christian Grimme, Dennis Assenmacher, Lena Adam

2018Social Computing and Social Media. User Experience and BehaviorSpringer International Publishingpp. 445--461
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2017

Stream Clustering of Chat Messages with Applications to Twitch Streams

Matthias Carnein, Dennis Assenmacher, Heike Trautmann

2017Proceedings of the 36th International Conference on Conceptual Modeling (ER '17)Springer International Publishingpp. 79--88
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An Empirical Comparison of Stream Clustering Algorithms

Matthias Carnein, Dennis Assenmacher, Heike Trautmann

2017Proceedings of the ACM International Conference on Computing Frontiers (CF '17)pp. 361--365
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