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Why do we need critical appraisal

Critical appraisal is an essential part of the Evidence Based Practice process. Critical appraisal identifies possible flaws or problems with the study methodology, the transparency of the study design as written in the article, the quality of the research, and  level of evidence.

Appraisal Concepts - Validity & Reliability

What is validity?

Critical appraisal will help to determine the validity of a study in two important ways. Internal validity relates to the reliability and accuracy of research results, effected by the appropriateness of the research methods used to address the research question, and the extent to which a study measures what it sets out to measure. External validity relates to the extent to which research results are generalizable to populations beyond the study participants.

What is reliability?

Reliability is the extent to which the results of the experiment are replicable.  The research methodology should be described in detail so that the experiment could be repeated with similar results.

Critical Appraisal Checklists

The below sites host checklists which can be used to help appraise the reliability and applicability of publications, ranging from peer-reviewed articles to grey literature