Figure 8
From: Error and attack tolerance of collective problem solving: The DARPA Shredder Challenge
Impact of attacks on user behavior in Puzzle 4. Each dot represent a user plotted along two features: the total participation time (x-axis) and the total number of contributions, i.e. moves (y-axis) on a log-log scale. Large red dots in Puzzle 4 represent reported attackers. Thick lines are linear fits. In all three panels of Puzzle 4, the fit of Puzzle 4 before the attacks (blue) is represented to provide a reference point to visually assess the effect of the attacks. For the same purpose the fit of Puzzle 3 (green) is represented in the panel of Puzzle 4 before the attacks. Note that Puzzle 4 before and after the attacks contain about as many users although they lasted respectively 1.5 and 14 days. Moreover these are about the same set of users with 98% of users of Puzzle 4 before the attacks returning after the attacks.