Results of the Mann-Whitney U test and t-test for the inequality of the computed three forms of iterated algorithmic bias based on the different probability levels of human action.

Here, effect size is computed as ES = (Gini|t = 0 − Gini|t = 200)/standard.dev. Bold means the significance at p<0.05. The more the human reacts to the system, the bigger is the inequality in the prediction.