Before revision:  Based on our theoretical analysis, numerical simulation, and reanalysis of four previously published experiments (which included a total of 4,002 human URLanized in 131 independent groups ), we demonstrate that the wisdom of crowds in estimation tasks depends on the interaction between the following two factors:
After revision:  Based on our theoretical analysis, numerical simulation, and reanalysis of four experimental datasets (totaling 4,002 human URLanized in 131 independent groups ), we demonstrate that the wisdom of crowds in estimation tasks depends on the interaction between the following two factors: