I'm Ruben.

My work sits at the intersection of AI and HCI, with a particular interest in making intelligent systems more understandable: why a system behaves the way it does, and how it arrived at a particular result. My current research explores how LLMs use human personality information, including how psychological information can shape personalised or role-playing interactions and how such personalisation may be misused.

Outside research, I enjoy heist and crime films, fictional books, reverse-engineering games and creating mods. I also like building technical side projects, whether that's a small tool for a friend or a rather unnecessary experiment that somehow turns into an ML project.