DISCUSSION ASSIGMENT: What would you look for in an Assessment Tool for patient

DISCUSSION ASSIGMENT:
What would you look for in an Assessment Tool for patient symptoms?
To answer this discussion, please use the “theory of unpleasant symptoms” as a guide (Nursing profession).
Please follow this instructions to write the discussion assigment:
This discussion is related to “Theory of Unpleasant Symptoms” , please focus in the following topic that need to be covered in this assigment.
Historical Background
The Theory of Unpleasant Symptoms
Description of the Theory of Unpleasant Symptoms
Models That Expand or Modify the Theory of Unpleasant Symptoms
Assessment of Symptoms
Instruments Used in Empirical Testing
IMPORTANT:
Please provide at least 4 (four) REFERENCES less than 5 years old and from scientific papers ONLY (online website, blogs, wikipedia: are not allowed).