Answer:
This tendency is called the Availability heuristic.
Step-by-step explanation:
The availability heuristic is a reasoning method, a shortcut in which the individual relates immediate examples when evaluating a specific topic. It is a misconception that what comes to mind quickly is significant.
In this case, when quickly recalling a recent example of violence, one tends to overestimate the amount of violence in the world. It is an example of availability heuristic.