Interesting Psychological Exercise

I enjoyed a recent Psychology Today article (link below) about a contest that was run, open to anyone who wanted to participate. All you had to do to take part was provide a number between 0 and 100 indicating what you thought 2/3 of the average of the rest of the numbers provided would be. In case that's not clear: contestants were challenged to try to figure out what they thought the average of everyone else's numbers would be, take 2/3 of that average and submit that number as their entry. So if you thought the average of what everyone else would submit was going to be 30, for example, you'd submit 20 (2/3 of 30).

Before you read the article, take a moment and decide what strategy you'd use and which number you'd supply, and then follow the link and see how you might've done. Fascinating stuff! Here's the link.