Our bias blind spot.

Pronin et al carry out three studies that suggest that knowledge of particular biases in our judgment and inference, and the ability to recognize the impact of those biases on others, neither prevents us from succumbing nor makes us aware of having done so. Indeed, participants in their research denied that their assessments of their personal qualities and their attributions for a particular success or failure had been biased even after having displayed the relevant biases and reading descriptions of them.