Accent Discrimination-"Mary had a little lamb..."

First off, I didn't know all the answers to the quiz. I only got about 3/4 of the answers correct. But there were reasons I knew the answers to the ones I did get correct on the quiz. I have heard these accents around me in everyday life. They have been replicated on TV, stereotyped at school, found within the people I knew. The association between accent and race was deep, one hard to ignore.
When trying to identify the speakers, I felt like I was just following stereotypes when I picked the right answers. It almost made me feel guilty that I could make those associations so lightly without realizing the consequences of those associations in everyday life. They lead to discrimination, even if the person is just on the phone. The speakers that I guessed wrong had accents that varied from the common stereotype. For example, three of the hispanic speakers did not have distinctly "hispanic" accents as I generally hear them, so it was hard to guess what ethnicity they were. I listened to them again, and I still can't hear any differences in the way they speak when compared to the white speakers.
Some of the speakers were obvious, for example, the indian speaker. Indian speakers sometimes say their "w" with a "v" sound, which is what the speaker did with "white". The middle eastern speaker was easy to distinguish because of the pronounciation of the "r" in "Mary" and "sure". The "r"s were rolled to an extent, but differently than the hispanic rolled "r". I'm not quite sure what is different within the black accent, but I know I can identify it. One of the black speakers was very easy to distinguish. However, the one with some sort of a Caribbean accent was more difficult to pinpoint. For the "white" accent, I just listened for "standard" sounding English, which is in itself, also a stereotype. I turned out to be right, but it made me realize the kind of rash assumption I can make.
When it comes to how I knew the answers to the quiz, I'm not sure, I just did. I based it on prior experience, but I still don't really understand the linguistic differences within each accent. Picking up on accents is just something we do automatically, without thinking about it.
This quiz made me realize that even if we try not to discriminate on accents, sometimes we do without realizing it. I made assumptions in this quiz that were not well founded and could lead to real problems if I was speaking with these people in everyday life. This quiz made me realize I need to be more careful in jumping to conclusions about someone just by hearing them talk.
Implications of accent discrimination and stereotypes can be seen in the article from overlawyered.com. There are clear cases of discrimination because of accent. In the article from WashU, I was surprised to see how explicitly accent discrimination occurs. The study was kind of disheartening, it made me tell myself not to ever discriminate against accents.