The Journey from White Lies to the “Bigly” Ones

By Dov Michaeli, MD, PhD

An ingenious experiment

Dr. Tali Sharot and her team of University College London and Duke researchers conducted a series of experiments that start to answer some of these questions. To test for dishonesty escalation and its underlying neurological mechanism, they combined brain imaging with a behavioral task in which individuals were given repeated opportunities to act dishonestly.

Not all lies are created equal

Duh, everybody knows that. We call it “white lies” and “big lies”. How many times have you said “OMG, you look great!” to somebody who is seriously ill? Or on the opposite end, “I never said it” when the evidence is on video for all to see? But, by repeating the experiment 60 times, the researchers were able to see another aspect of dishonesty — its development.

The slippery slope in the brain

As I said, 25 of the participants lied while lying in the MRI machine. The area of the brain that “lit up” the most, or showed the greatest enhancement of metabolic activity, was a pair of almond-shaped neural centers called the amygdala. This region of the brain coordinates emotional responses. These can range from fight or flight to anger and aggression. But they also deal with the emotional discomfort we feel when our actions do not comport with our conscience — cognitive dissonance, as it is known in psychology.

The role of adaptation

But why did the spikes of activity decline with repetition of the lying? The authors suggest that this is a manifestation of a phenomenon called adaptation. The same process occurs when you repeatedly show people unpleasant images. Remember the picture of the dead Syrian boy on the beach? Or the planes flying into the Twin Towers? The first time we saw them, we were horrified. But when these images were put on an endless loop day and day out, our reactions became progressively muted. We and our brain underwent adaptation.

Dr. Patricia Salber and friends weigh in on leading news in health and healthcare

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store