Here's a small module on the basics of vibrato. Its basic and I exhort you to please stop with the philosophy and try to see the point and hear it as well. Self criticism is the most important thing in this hearing test.Please follow the instructions and you will hear results.This is the most critical facet to being a decent sounding electric guitar player. I will make a few more giving you all sorts of bends to make a little library of your own.
http://www.youtube.com/watch?v=oosT0RfteWI