A couple weeks ago I published a guide to cognitive biases for journalists. I saved perhaps the biggest one of all — confirmation bias — for a post all of its own. It might be one of the best-known biases, but for that very reason it can be easy to underestimate. Here, then, is what you need to know — and what to do to reduce it.

What is confirmation bias — and how does it affect journalism?

Confirmation bias is the tendency to seek out — or more easily believe or recall — information that confirms our existing beliefs.

It leads us to make judgements that are not based on an equal assessment of all the evidence, but only that evidence we have cherry picked, remembered or attributed more credibility to.

Confirmation bias affects journalists in at least three ways: Continue reading →