Confirmation bias is the idea that people are more likely to look for and readily believe information that confirms their worldview. In a talk conducted with Google, Sharot showed the power of confirmation bias by playing a game with the audience. She wrote down the numbers two, four, and six. She then asked two questions. The first, was to come up with a set of three numbers. She would then tell the person whether or not those numbers fit the rule. After this, the person was asked what the rule is. The majority of people guessed trios like eight, ten, and twelve, and when asked what the rule was, said something about even numbers. In reality, any series of escalating numbers would have fit Sharot’s rule.

This exercise illustrated our tendency to formulate strong beliefs based on limited data, and the immediacy with which we look for confirming evidence. The purpose in this exercise was to demonstrate how easily we pick evidence that comports with our beliefs, and how rarely we challenge those beliefs once we have them. Nowadays, with information so readily available, it’s easy to go online and find evidence to backup any belief under the sun. With this in mind, it’s easy to see how America became so socially and politically polarized.

Tali Sharot discussing her theories

Sharot goes on to explain even further, and discusses a few experiments she conducted regarding the way we reckon with data. According to her, beliefs can directly interfere with our ability to understand information. This phenomenon isn’t exclusive to people with cognitive impairments either. It would seem, according to Sharot, that most people aren’t hardwired for doubt. This behavior also extends to the world of debate. By using MRI machines, Sharot was able to measure the brainwaves of people in conversation, and was able to show that when two people agree, confidence in an opinion rises. On the flipside, brainwaves more or less shut down when people disagree. While this isn’t surprising to anyone who spends Thanksgiving with their family, it’s always worth noting when idiomatic beliefs, through careful study and observation, bleed into the world of cognitive psychology.

Tali Sharot with her Time cover

The real question is, now that we have scientific proof that these phenomenons govern our behavior, how do we use this information to our advantage? According to Sharot, we react to positive information similarly to the way in which we react to tangible rewards. When it comes to bad news however, our brain tends to prefer ignorance and “frantically distorts” information that a person doesn’t agree with. The way to successfully discuss our differences is by framing them in ways the brain will naturally understand. For example, people learn more from good news than they do from bad. People also tend to believe positive statistics more than negative ones. By approaching a conversation from the positive, a person is more likely to be successful in convincing others of their point of view.