Market Feedback Does not Eliminate Biases in the Perception of Independence

In individual decision making experiments I test the robustness of biases in the perception of independence and whether they survive feedback about the median decision in groups of five. I argue that the median decision reflects the market clearing price in an equivalent interactive market setting. Despite better experimental control, known biases are confirmed but also qualified. While feedback reduces biases it does not affect behavior significantly and no learning over the 98 repetitions can be observed.