Marco insists that women are poorer drivers than men. To back up his claim he describes two incidents: one in which his girlfriend sideswiped a car and a second in which his mother failed to react in time to avoid hitting a squirrel on the highway. Marco's attention to this positive evidence for his belief reflects

In psychology, the term confirmation bias refers to the tendency that people have to search for information that will confirm their point of view and ignore the information that contradicts it. It also involves remembering events that will support your belief and not taking the other ones into account.

In this example Marco has the belief that women are poorer drivers than men. To back up his claim, he describes two incidents regarding her girlfriend and his mom that support his belief. We can see that Marco is only paying attention to the information that will confirm his point of view (two incidents) and will ignore or forget any other incidents that contradict it. Therefore, Marco's attention to this positive evidence for his belief reflects confirmation bias.