the availability heuristic

Your judgments are influenced by what springs most easily to mind.

How recent, emotionally powerful, or unusual your memories are can make them seem more relevant. This, in turn, can cause you to apply them too readily. For instance, when we see news reports about homicides, child abductions, and other terrible crimes it can make us believe that these events are much more common and threatening to us than is actually the case.

Try to gain different perspectives and relevant statistical information rather than relying purely on first judgments and emotive influences.

Further reading
You Are Not So Smart | Wikipedia | Thinking, Fast and Slow (Please note this is an Amazon Associates link)