Once you have asked the clinical question and searched for evidence, you need to evaluate and critically appraise the evidence you have located in order to:
There are a number of tools you can use to help you evaluate evidence or information. One of these is the CRAP tool. The CRAP tool is a set of criteria; Currency, Reliability, Authority and Purpose, that you can apply to any information resource. The CRAP tool is discussed in more detail on the Evaluating Information page.
A tool specifically designed to help you when evaluating evidence based practice research is CASP (Critical Appraisal Skills Programme). For more information on CASP see the CASP page in this guide.