terminology question

[Steve Hollis]

Greetings,

I subscribed to this list in hopes of finding out some information.  I
am having a little trouble in some research and I believe it is because
I don't know the correct terminology.

I am looking for the correct vocabulary to describe people changing
dialects due to changing social groups.  For example, when I go to visit
my parents in rural Alabama, my accent deepens and I speak with a more
rural dialect.  Is a dialect shift what I am looking for?

Any articles that explains this phenomenon would be most helpful.

Thank you all in advance for your time.