I think this video says it all: http://www.youtube.com/watch?v=pIAoJsS9Ix8
Interesting! But I wonder how they phrased that to the kids, I mean if they said something like "Here I'll show you!", and then sat next to the kid as shown, that kid probably felt some pressure to do as shown, regardless of logic, while the apes just want the candy. Would be interresting to see the kids when left alone with a box like that...
But here I am, second guessing the study that a team of presumably really intelligent researchers have spent a long time working on, a few minutes after seeing a tiny bit of all their work... reminds me of xkcd.com/277/
Since Robert Pirsig put this very well, I’ll just copy down what he said. I don’t know if this story is based on reality or not, but either way, it’s true.