The ‘Marketplace of Ideas’ Probably Doesn’t Exist. What Does That Mean For Free Speech?

An intellectual problem for those who defend freedom of expression

Amid all the concern about ‘Fake News’ and the increasing polarisation in politics, there is a psychological insight that I have seen explained and shared in many forms: when presented with a fact that contradicts a strongly held belief, people often reject the fact and double-down in their belief.

This is the Backfire Effect, a phrase coined by the American academics Brendan Nyhan and Jason Reifler. Here’s part of the abstract to their 2006 paper ‘When Corrections Fail‘:

Can these false or unsubstantiated beliefs about politics be corrected? Previous studies have not tested the efficacy of corrections in a realistic format. We conducted four experiments in which subjects read mock news articles that included either a misleading claim from a politician, or a misleading claim and a correction. Results indicate that corrections frequently fail to reduce misperceptions among the targeted ideological group. We also document several instances of a “backfire effect” in which corrections actually increase misperceptions among the group in question.

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