Researcher at the German Institute for Adult Education – Leibniz Center of Lifelong Learning. Principal Investigator of the research project, “The Reciprocal Relationship of Public Opinion and Social Policy“. Principal Investigator of “The Crowdsourced Replication Initiative” and “The Role of Theory in Resolving the Reproducibility Crisis“. Open Science advocate. Open Science Fellow at Wikimedia with the project, “Giving the Results back to the Crowd“. User of preprints. Crowdsourcing and Mertonian-norm advocate. Author of the open science and crowdsourcing blog “Crowdid”.