Connect the search terms chosen previously to formulate search strings. For this purpose, researchers use Boolean Operators: AND, OR and NOT. The best way to visualize the function of each connector is to look at a Venn diagram. The colored area indicates the number of items with the terms that will be retrieved in each case.
Searching in Cochrane
Critical Appraisal or Evaluating Research Studies
What is a critical appraisal? Watch, "Introduction to Critical Appraisal." Trisha Greenhalgh's book that is mentioned in the video,How To Read a Paper, is available from the Oregon Tech Library:
