Making judgement as to whether a theory could be adapted for use in research is

Making judgement as to whether a theory could be adapted for use in research is very important. 1. Describe the internal and external criticism that is used to evaluate middle range theories.
Please include 400 words in your initial post with two scholarly articles by Wednesday midnight and 200 words in two answers to your peers by Saturday midnight.from the Book (MIDDLE RANGE THEORY FOR NURSING)