Discussion: Assessing Quality Greenhalgh
NOW FOR AN ORIGINAL PAPER ASSIGNMENT:Discussion: Assessing Quality Greenhalgh
Critical appraisal Nurses may not be in a position to be involved in research studies or undertake research themselves. They do, however, have the capacity to make sense of published
evidence through appraisal of the literature. Critical appraisal is the process of examining systematically a research article to assess its validity – whether the study measures what is says it measures – results and relevance before using the evidence to inform decision making (Burls 2009). It is the process of assessing the facts presented and the quality of the study to determine best evidence (Fowkes and Fulton 1991, Burls 2009). Nurses should, however, be aware that not all published studies are of a good quality and that research may be poorly reported, weak in design or flawed (Greenhalgh 1997, Churchill 1998, Godshall 2009).
Critical appraisal is therefore a fundamental component of establishing evidence-based practice. Sackett et al (1996) suggested that critical appraisal of the best available and clinically relevant information is essential for designing and developing new research, and integrating it with clinical expertise to implement evidence-based practice. Nurses should be able to use their critical appraisal skills to decide whether the quality of the research evidence is sufficient to underpin their practice or whether the evidence is flawed.
Most published research articles go through a peer-review process, where the credibility of the article has been assessed by experts from within the area in which the research was carried out. The purpose of critiquing is to analyse a research article, identifying flaws, evidence of bias or other factors that might have affected the results and how this, in turn, might affect the findings or outcome (Godshall 2009). Complete time out activity 1
Assessing quality Greenhalgh (1997) identified three key questions for assessing the methodological quality of a research article: �4Why was the study done and what clinical question were the authors addressing? �4What type of study was undertaken? �4Was the study design appropriate for the research?
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