Confirmation bias is the tendency of individuals to pay attention to or believe information that confirms the personal values and beliefs they already hold, rather than allowing their beliefs to be changed by new information.
It’s a powerful force that many researchers have suggested plays a key role in the persistence of phenomena such as climate doubt. With an overwhelming abundance of evidence pointing to the existence of anthropogenic climate change, for instance, many scientists have questioned why skepticism continues to be pervasive in society. Sociologists have suggested that the reason has to do with the fact that it’s difficult to change an individual’s worldview simply by presenting new information. Confirmation bias, rather, leads people to seek out evidence — however small or poorly supported — that supports their existing personal beliefs. 
Seems to be a simple enough explanation….We can all [present company included] insist that we’re always objective and always looking at all sides of important issues, but … not really. Human nature is what it is. This is true for conservatives and progressives—denials and finger-pointing duly noted.
For the great majority of issues, questions, and concerns that pop up on our daily radar screens, this psychological short-cut is certainly handy, and rarely a cause of any great trouble in our lives. It’s a different story for matters whose scope and impact extends beyond today in our own little worlds.
Climate change is certainly one such issue, as was explored in Chelsea Harvey’s above-referenced Washington Post article about a study which examined the spread of misinformation online. Any number of contentious political/economic/cultural topics likewise fall under that widening umbrella. The report’s lead author offered one of the main conclusions validating the impact of confirmation bias as it relates to the spread of climate change denial:
…click on the above link to read the rest of the article…