You are very quick to dismiss psychological egoism :) (Not that it's a very useful hypothesis, really)
I'm undecided on the matter, but the $20 thing is clearly not self-less altruism. Someone willing to spend $20 to prove they're "right"? I'm just not convinced.
Your experiment sounds interesting. I worry that people would still expect to be judged for it though (I mean, if they know they're participating in an experiment, they're expecting the results to be recorded and/or being watched, as you say). Also I expect that decades of acting a certain way due to being observed by society will form some pretty strong habits. Sounds fascinating none-the-less :)
I'm undecided on the matter, but the $20 thing is clearly not self-less altruism. Someone willing to spend $20 to prove they're "right"? I'm just not convinced.
Your experiment sounds interesting. I worry that people would still expect to be judged for it though (I mean, if they know they're participating in an experiment, they're expecting the results to be recorded and/or being watched, as you say). Also I expect that decades of acting a certain way due to being observed by society will form some pretty strong habits. Sounds fascinating none-the-less :)