Hi, I would like to know whether there are any theories related to accents and dialects?

Im currently doing a research proposal about the effect of accent and dialect on students academic performance. Really appreciate your help. or:I'm cu

I'm currently doing a research proposal about the effect of accent and dialect on students academic performance. Really appreciate your help.

or:I'm currently doing a research proposal about the effect of accent and dialect on students academic performance. Really appreciate your help.

or:A common therory I hear is the tabula rosa effect. We're every experience makes you who you are

or:The only proposal I have heard was from a martial arts instructor. The karate yell is a big deal, and this fellow noticed that it varied according to ethnicity: Japanese students tended to sound like \"eh-ee\" and Americans tended to sound like \"heeyaw\" or \"hooey\". He suggested that it was due to genetic differences in the shapes of the vocal tracts. www.amazon.com/Ninjutsu-Invisible-Stephen-K-Hayes/dp/0809254786/ref=sr_1_4

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