http://exp.si.umich.edu
and click on Register as a participant to set up an account - you will begin receiving emails about upcoming experiments.
We are an experimental economics research group on main campus at the Institute for Social Research (located at 426 Thompson St.)
You will always receive at least $5 for showing up. Other earnings can be significant, and depend on decisions you make and others make in the experiment. All of our studies are approved by the Institutional Review Board.