You need to turn over the 8 and Brown cards.
This, yeah. I'm assuming many people will say it involves turning the red card.
Can you explain this more? I am curious about it. I looked up what the Wason was and got...
Well, I think the overall trick about this experiment is that in this setting, most people get it wrong. However, when reformulating the same problem in a social setting (and I guess specifically one that involves cheating on others), most people get it right. Which indicates that people have a special "module" in their brain for dealing with this stuff in social contexts, suggesting that that module is a "morality module" used for keeping scrutiny over other community members.
I haven't read the paper itself, but considering the experiment is referred to as a classic one, I take it the evidence must be very compelling.
rumborak