Nowadays, it is hard to venture online without coming across a heated discussion over “Fake News”; as a result, people are finding hardE times moving through an entirely new distorted era of misinfor-mation and biased news. In this paper, we investigate the effect of fake news on people’s opinion polarization on a hot topic – such as immigration – through an experiment. We show that “Backfire Effect” and a cognitive bias we named “Validation Myopia” occur when people read Fake news in-dependently if they believe them or not. In addition, we show how Fake news affect opinion polariza-tion and we provide evidence that the Backfire Effect has a higher magnitude than its counterpart (i.e. validation myopia). Finally we show that the emotion-driven effect of fake news can be neutralized thanks to ex-ante signaling of the inaccuracy of fake news
