Redundent adjectives

Here in the South, (and also in the South West) you will often hear redundent adjectives. For example, someone will say "I did enjoy reading this here book" or "He takes a lot of pride in that there dog." This book or that dog is all that is needed. I often wondered from where came this predeliction to emphasis the idea by adding another,unneeded word?
Do you suppose this is just another example of our southern tendency to let our mouth run before our brain is engaged?