fig 1-3 - Levels of Research Evidence The strength or validity of the best research evidence in an area depends on the quality and quantity of the

fig 1-3 - Levels of Research Evidence The strength or...

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Levels of Research EvidenceThe strength or validity of the best research evidence in an area depends on the quality and quantity of the studies that have been conducted in an area. Quantitative studies, especially experimental studies such as the RCT, provide the strongest research evidence (see Chapter 8). Also, the replication or repeating of studies with similar methodology increases the strength of the research evidence generated. The levels of the research evidence are a continuum, with the highest quality of research evidence at one end and weakest research evidence at the other (Brown, 2014, Craig & Smyth, 2012, Melnyk & Fineout-Overholt, 2011; Figure 1-3). The systematic research reviews and meta-analyses of high-quality experimental studies provide the strongest or best researchFig 1-3 Levels of Research Evidence.evidence for use by expert clinicians in practice. Meta-analyses and integrative reviews of quasi-experimental, experimental, and outcomes studies also provide very strong research evidence for managing practice problems. Mixed-

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