Literature Review is a comprehensive survey of the works published in a particular field of study or line of research, usually over a specific period of time, in the form of an in-depth, critical bibliographic essay or annotated list in which attention is drawn to the most significant works.
Also, we can define a literature review as the collected body of scholarly works related to a topic:
The objective of a Literature Review is to find previous published scholarly works relevant to an specific topic
A literature review is important because it:
Source: "What is a Literature Review?", Old Dominion University, https://guides.lib.odu.edu/c.php?g=966167&p=6980532
A systematic review answers a defined research question by collecting and summarizing all empirical evidence that fits pre-specified eligibility criteria.
Systematic reviews, just like other research articles, can be of varying quality. They should have:
Not all systematic reviews contain meta-analysis.
Source: "Systematic reviews vs. Meta-Analysis," Old Dominion University, https://guides.lib.odu.edu/c.php?g=966167&p=7021863
Meta-analysis is the use of statistical methods to summarize the results of independent studies. By combining information from all relevant studies, meta-analysis can provide more precise estimates of the effects of health care than those derived from the individual studies included within a review.
A meta-analysis goes beyond critique and integration and conducts secondary statistical analysis on the outcomes of similar studies. It is a systematic review that uses quantitative methods to synthesize and summarize the results.
An advantage of a meta-analysis is the ability to be completely objective in evaluating research findings. Not all topics, however, have sufficient research evidence to allow a meta-analysis to be conducted. In that case, an integrative review is an appropriate strategy.
Source: "Systematic reviews vs. Meta-Analysis," Old Dominion University, https://guides.lib.odu.edu/c.php?g=966167&p=7021863
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