Most of us acknowledge the need to be objective; in what we believe or what we decide. Yet, we find it tough to follow the path of true objectivity as the pull from the value system is so strong. And we settle for results that fit with our current ideas.
My-side objectivity
And that is confirmation bias. It is a state in which individuals will search, accept and interpret information that favours their existing beliefs. Traditionally it required active selection from the individual, be in the newspaper she chooses, the books she reads etc.
Filter bubble
Naturally, the bias also requires us to ignore the evidence that does not fit our liking. And that used to be a difficult job. But that is past. With the introduction of filter bubbles or those algorithms that choose the feed for you, confirmation has reached a different level. The algorithm practically takes the decision, on your behalf, on what to click on and what not to.