To prepare: Review this week’s Learning Resources, and consider the factors that impact the validity and reliability of various assessment tools and diagnostic tests. Select one of the following assessment tools or diagnostic tests to explore for the purposes of this Discussion: Mammogram Physical tests for sore throat (inspecting the throat, palpating the head and neck lymph nodes, listening to breath sounds) Prostate-specific antigen (PSA) test Dix-Hallpike test Body-mass index (BMI) using waist circumference for adults Search the Walden Library and credible sources for resources explaining the tool or test you selected. What is its purpose, how is it conducted, and what information does it gather? Examine the literature and resources you located for information about the validity and reliability of the test or tool you selected. What issues with sensitivity, specificity, and predictive values are related to the test or tool? Are there any controversies or issues related to any of these tests or tools? Consider any ethical dilemmas that could arise by using these tests or tools.