Javier is listening to the sports updates on the radio. his girlfriend is talking to him at the same time. unfortunately, he did not perceive a single word his girlfriend said. this is an example of:

This is an example of selective attention.

Explanation:

Selective attention refers to the ability to focus on a certain stimulus while blocking out the other ones. Just as the name states, the attention selects what to focus on and everything else becomes secondary and is not processed.

In this case, Javier selectively focusing his attention on the sports updates on the radio so even if his girlfriend talks to him, he won't process that information and will not know what she said because of this.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

chavez's example shows that nonviolent protest can work well. it shows that one nonviolent man can stop a mob, which proves chavez's point and persuades people to protest nonviolently.