Niklas Keller

Guest Scientist

Website Niklas Keller


Niklas Keller is co-founder and managing partner of Simply Rational GmbH, as well as an associated scientist at Charité Universitätsmedizin Berlin, the Harding Centre for Risk Competence and Technische Universität Berlin. Niklas' work and research focus is on decision-making under uncertainty, the development of decision support tools in critical situations, as well as medical risk communication and defensive decision-making. In cooperation with the German Armed Forces, he developed simple decision support tools to differentiate between civilians and suicide bombers at military checkpoints in Afghanistan. In his work at the Charité, he developed data-driven, but simple, decision rules for assigning patients to intensive care units and taught medical students and clinicians how to interpret and communicate medical statistics.

Research interests

  • Communication of Risk and Uncertainty
  • High-Stakes Decision Making (medical, military, police)
  • Defensive Decision Making / Organisational Error Cultures

Selected publications

Keller, N., Feufel, M. A., Kendel, F., & Spies, C. D. (2023). Boosting for insight and/or boosting for agency? How to maximize accurate test interpretation with natural frequencies. BMC Medical Education, 23(1), 1-10. DOI:10.1186/s12909-023-04025-6

Keller, N., Hecksteden, A., Zhang, G., Meyer, T., & Hauser, T. Why humble farmers may in fact have bigger potatoes-A call for street-smart decision-making in sport: Rethinking decision-making in sport. DOI:

Keller, N., Deffland, M., Spies, C., Weiss, B. (2020), Effects of pain, sedation and delirium monitoring on clinical and economic outcome: A retrospective study, DOI:10.1371/journal.pone.0234801

Keller, N., Bosse, G., Memmert, B., Treskatsch, S. (2020): Improving quality of care in less than 1 min: a prospective intervention study on postoperative handovers to the ICU/PACU, DOI: 10.1136/bmjoq-2019-000668