Meta-analysis differs from meta-synthesis in that meta-analysis studies use which of the following? Select all that apply
A) Objectivity in drawing conclusions regarding a body of evidence
B) Combining phenomena into a transformed whole
C) Subjective decisions about how much weight to give findings from different studies
D) A measure of the probability of detecting a true relationship between variables
A, D
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Meta-analysis offers a simple advantage as an integration method: objectivity. It is difficult to draw objective conclusions about a body of evidence using narrative methods when results are disparate, as they often are. Narrative reviewers make subjective decisions about how much weight to give findings from different studies, and so different reviewers may reach different conclusions about the evidence in reviewing the same studies. Meta-analysts also make decisions, but the decisions are explicit and open to scrutiny. Another advantage of meta-analysis concerns power, i.e., the probability of detecting a true relationship between variables (Chapter 12). Schreiber and colleagues (1997) offered a definition that has often been used for what metasynthesis is, "…the bringing together and breaking down of findings, examining them, discovering the essential features and, in some way, combining phenomena into a transformed whole" (p. 314).
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