One of the accusations that I often hear nowadays is that a given person arguing for something is biased. Those who promote conspiracy theories use this very epithet against anyone who dares to criticize them, and likewise, those who dismiss conspiracy theory proponents argue that they are the ones who are biased. In the popular mind, a “bias” is a negative thing to have, and the condition of being biased is synonymous with not being able to know the truth. The “bias” label is particularly contemptuous when levied against a scientist. After all, scientists are in the business of discovering the truth about the way matter and energy behave in the world around us. How can scientists discover the truth if they are biased? In popular culture a biased scientist is as blind as a bat incapable of echolocation, and whatever science they do will not reflect reality.
Let’s first address this issue by stating the obvious. We are all biased, and most of the time the biases we have are not something we have consciously chosen to have, but rather they are a consequence of the way the wiring of our brain has interacted with our particular life experience and the stimuli to which we are currently exposed. But being biased is not something that is necessarily negative. In fact, as it turns out, bias has a useful function! It allows us to simplify the complexity of our world in order to gain a measure of control over it. A bias allows us to quickly take action rather than be paralyzed by a multiplicity of seemingly equivalent alternatives. From this point of view, bias actually has a survival value and may have played a role in the successful evolution of our species.
The downside of bias is, of course, that you will blind yourself to the truth. Thus, to avoid bias, some people suggest that we should keep an open mind. However, this suggestion, although well meaning, is misguided. If you keep your mind too open, people will dump a lot of trash into it. The proper way to deal with bias is not to keep an open mind. The proper way to address bias is to strike a balance; what I call “finding the Goldilocks zone”. This entails accepting that we are all biased, that we can’t help being biased, and that, in fact, a bit of bias can be a good thing, while at the same time taking steps to counter the excess bias in ourselves through thought and action.
Now let me tell you how scientists do this.
But before I do that, let’s state that science has a healthy inbuilt bias. Science has a bias for established science. The majority of scientists believe that accepting something as true when it is false, is a greater evil than rejecting something as false when it is true. This is because established science has at least grasped some aspects of reality. If other scientists want to replace established science with a more complete description of reality, then the burden of proof is on them. This bias for established science is needed to protect science from error.
Thus, you may ask: If scientists are biased for established science, how can they discover anything new?
The answer is by using anti-bias protocols. For example, scientists will analyze or score the results of some experiments in a blind fashion. This involves the person doing the scoring or the analyses not knowing the identity of the different experimental groups. In clinical trials this involves the patients not knowing which treatments they received or even both the patients and the doctors not knowing which treatment is which (double blind protocol). Scientists will also seek to reproduce each other’s observations or experimental results. If an observation or an experimental result cannot be reproduced, then it will not gain traction. Finally, some funding agencies will devote a certain amount of their resources to funding scientists with unorthodox views to promote the debate of alternative views in a scientific field.
But how can non-scientists counter their biases?
First of all, you have to be exposed to all the facts. For example, if you listen only to conservative or liberal media, you will not learn about some issues or views. You need to listen to the other side. However, this does not mean that you have to force yourself to listen the conspiracy-laden drivel coming out of far right or far left media. Instead try to locate a moderate news source or a news source that leans slightly towards the opposite side of the political spectrum that you favor. The idea is not to open your mind to what these news outlets have to say, but rather to become aware of the issues they are covering, why they find them important, and what their arguments are. Avoid insulating yourself and living in an “echo chamber”.
Second, try to identify a person from the other side who holds views different from yours and sit down to have a talk one day. But when I say “person”, I don’t mean a nutjob who spews far-out nonsense and will engage you in a shouting match. Choose a reasonable person. There are quite a number of these out there. A rule of thumb to choose a reasonable person is to look for someone who, despite disagreements, accepts that “the other side” has made valuable contributions and is necessary to the debate. Nothing beats discussing issues with an individual who disagrees with you but also respects you.
And finally, learn to identify the characteristics of bias. Sweeping generalizations, innuendo, exaggerations, hearsay, judging the many by the actions of the few, the creation of strawmen, ignoring weaknesses in arguments, not seeing the forest for the trees, and attacking the person instead of the argument are all things that signal an emotional and irrational approach to issues that is indicative of a person who is biased and therefore unable to correctly grasp reality. Ask yourself if you are exhibiting these traits when you engage in arguments. Ask others who will tell you the truth if you are exhibiting these traits.
So to wrap it up, a little bias is acceptable and even healthy, but too much bias can mess up your perception of reality. When it comes to bias, try to find the Goldilocks zone.
The image “Goldilocks tastes the porridge” from the New York Public Library is used here under a Creative Commons CC0 1.0 Universal Public Domain Dedication ("CCO 1.0 Dedication") license.