In the version of the test that I took (for extra credit) while at ISU you played a game against another competitor on a computer. You then had to choose what level (1-10) of "shock" to give them if you won (before you played the game). Then when you won (which you always did) you got to see what level they gave you. Basically I went in saying "f-it, lets go for broke" ...
Later learned of the experiments above ... I think this was prolly some grads students attempt at something similar without the real shocks.