Myside bias

As we sit here over six months after the initial lockdown provoked by COVID-19, the United States has moved out of a brief period of national unity into distressingly predictable and bitter partisan division. The return to this state of affairs has been fuelled by a cognitive trait that divides us and that our culture serves to magnify. Certainly many commentators have ascribed some part of the divide to what they term our “post-truth” society, but this is not an apt description of the particular defect that has played a central role in our divided society. The cause of our division is not that people deny the existence of truth. It is that people are selective in displaying their post-truth tendencies.

What our society is really suffering from is myside bias: People evaluate evidence, generate evidence, and test hypotheses in a manner biased toward their own prior beliefs, opinions, and attitudes. That we are facing a myside bias problem and not a calamitous societal abandonment of the concept of truth is perhaps good news in one sense, because the phenomenon of myside bias has been extensively studied in cognitive science. The bad news, however, is that what we know is not necessarily encouraging.

The Bias that Divides Us

A fascinating article by Keith E. Stanovich on what myside bias is. Highly relevant in these divided times and may help in understanding other person’s perspective. A bit more succinct explanation later in the article.

…people evaluate the same virtuous act more favourably if committed by a member of their own group and evaluate a negative act less unfavourably if committed by a member of their own group; they evaluate an identical experiment more favourably if the results support their prior beliefs than if the results contradict their prior beliefs; and when searching for information, people select information sources that are likely to support their own position. Even the interpretation of a purely numerical display of outcome data is tipped in the direction of the subject’s prior belief. Likewise, judgments of logical validity are skewed by people’s prior beliefs.

The Bias that Divides Us