http://weblab1.psychologie.uni-freiburg.de/them1/start-e.htm

Test your logical reasoning abilities on one of the hardest problems used in psychological reasoning research!

Web Experiment

Albert-Ludwigs University, Freiburg, (*University of Mannheim), Germany

Christoph Stahl, Edgar Erdfelder*, Christoph Klauer

February 22nd 2008 - April 22nd 2008