Being superstitious has to do a lot with how you have been educated, that being said I think that usually religious people tend to believe more in superstitions. Personally, I have some things that I believe to be true because that's what my parents tought me when I was little. Even though deep down I know that they are not true, I still stop when I see a black cat crossing the road, or think that I will have 7 years of bad luck if my mirror broke.
