From a study authored by Skyler S. Place, Peter M. Todd, Lars Penke, and Jens B. Asendorpf from (respectively) Indiana University, University of Edinburgh, and Humboldt University of Berlin.
“The videos of mate-choice situations were gathered during a series of laboratory-based speed dating sessions run at Humboldt University in Berlin, Germany. Speed dating is a paradigm designed to allow singles to meet a large number of possible mates in a short period of time.”