How Can Signs on Public Robots Prevent Robot Bullying: An Explorative Study about the Effects of Three Robot Communication Strategies on Subjective Perception, Visual Attention, and Bullying Tendencies of Passers-By in Public Spaces. - Kathrin Pollmann; Selina Layer; Amelie Polosek; Boyu Xian; Anna Vorreuther (HRI Companion, 2026)