Availability heuristic
up:: Cognitive Biases MOC This bias is a mental shortcut that makes us judge on topic on based of the examples that immediately come into our mind.
Thinking about the success of revolutions for example, everyone remembers the successful American or French Revolution but no one thinks of the hundreds of failed attempts.
In media
After seeing news coverage of homicide or airline accidents people judge that dying that way is more likely than common and un-sensational causes of death like common diseases.
In that way what people see in the media, affects their worldview.