One factor not really discussed is the ability to see both sides to an argument. If, by nature, someone is good at seeing things from various points of view and are presented with issues they have not previously formed a concrete opinion on I think they would be more likely to be tricked by this experiment. Part of exploring a moral dilemma is to attempt to view it in different ways. Unless someone has already done so before taking the test the ability to see it both ways may not imply they are stupid. It would be interesting to see if their original response allowed them to reply in a way that suggested they were undecided. If that was their position and they weren't given that option they could easily not recall which way they decided to go in their original answer.
I hate reading about the Dunning-Kruger effect as I initially start to question my intelligence. Then by the very implications of the theory I think well that must mean I am competent. Then as soon as I think that i think well darn now I think I am I must not be. It makes my little brain hurt.
Edited by tipsy_munchkin, 23 September 2012 - 10:00 AM.