Joachim Horvath (PI)


I am Assistant Professor (in German: “Junior-Professor”) at the Department of Philosophy II of Ruhr University Bochum, and I am also the principal investigator of the DFG-funded Emmy Noether Independent Junior Research Group Experimental Philosophy and the Method of Cases (EXTRA).

My main areas of research are epistemologymetaphilosophy, and experimental philosophy. In addition, I have strong interests in the philosophies of mind and language, metaphysics, and metaethics.


Alex Wiegmann (PostDoc)

I am the postdoc of the group and I am leading the empirical part of our project. I studied philosophy, psychology, and religious science at the University of Göttingen and got my MSc in Cognitive and Decision Sciences at University College London, UK. Back in Göttingen, I did my PhD in moral psychology and developed a causal model of transfer effects between moral dilemmas. Afterwards, my main interest changed to philosophical topics that can be informed by empirical research, i.e. experimental philosophy. Currently, my research focuses on the concept of lying, which is also the topic of my recently started PhD in philosophy.

You find my CV here.


Edouard Machery (Mercator Fellow)
University of Pittsburgh

I am a philosopher of science, working primarily on the philosophical issues raised by cognitive science and neuroscience. I am also doing empirical research on moral psychology, semantics, and folk epistemology, often with a cross-cultural focus.


Tetiana Adler (Project Administration)


Former Members

Michael Vollmer (Research Assistant)

Research Interests: Logic & Philosophy of Logic; (Social) Epistemology; Metaphilosophy


Vicki Papierski (Research Assistant)

Research Interests: Semiotics, Semantics & Pragmatics, Social Cognition


Steffen Koch (former PhD-student)

University of Bielefeld

Thesis: In Defense of Conceptual Engineering
Supervisors: Joachim Horvath and Thomas Grundmann