The theory of unpleasant      symptoms

Using the theory of unpleasant symptoms as a guide, what would you look for in an assessment tool for patient symptoms?
I have added the topic of the class, the weekly objectives and the student learning outcomes, please, choose 1 outcome and develop the question.
The discussion must address the topic, at least 400 words in your initial post. Minimum of 2 scholarly references in APA format within the last 5 years published. No plagiarism please.
Topic
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
Weekly Objectives
By the end of this lesson, the learner will:
Analyze the historical      background of unpleasant symptoms
Evaluate the use the theory      of  unpleasant symptoms in nursing research
Evaluate the use of the      unpleasant symptoms theory in nursing practice
Student Learning Outcomes (Outcomes 1, 2, 4)
After completing this course, the student should be able to:
Critically analyze the      philosophical underpinnings of nursing theories.
Critique nursing’s conceptual      models, grand theories, and mid-range theories.
Construct a nursing theory that      represent current professional nursing practice