It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
"Critical Appraisal Tools are structured checklists that allow you to check the methodological quality of a study against a set criteria. An advantage of using a CAT is that you can apply a level of consistency when reviewing a number of studies. However a potential disadvantage is that they may not ask about a potential source of bias that is important for the specific research questions being asked."
Critical appraisal tools are often used within medicine and health sciences to assess evidence but they can also be used in other disciplines. What critical appraisal tool you use depends on the study type you are looking at.