Accuracy when making criticisms is important. See this discussion, which is an extension of this.
More like this
Last month's Frontiers in Psychology contains a fascinating study by Dambacher, HuÌbner, and Schlösser in which the authors demonstrate that the promise of financial reward can actually reduce performance when r
A lot of people have read The Wisdom of Crowds by James Surowiecki. In the book, he gives an example of a group of people forced to estimate the weight of a cow.