Critical appraisal involves checking the quality, reliability and relevance of the studies being screened in relation to the review question.

Several tools for critical appraisal can be found at the Joanna Briggs Institute website.  There are checklists available to evaluate Case Reports, Cohort Studies, Prevalence Studies, and Qualitative Research, to name a few.  Tutorials for critical appraisal can be found in the Critical Appraisal Tutorials library guide.