Evidence synthesis and critical appraisal are two distinct but interrelated processes in the field of evidence-based practice and research. Here's a breakdown of the differences between them:
Critical Appraisal:
Evidence Synthesis:
In summary, critical appraisal involves assessing the quality and validity of individual research studies, while evidence synthesis involves aggregating and synthesizing findings from multiple studies to generate new knowledge or insights about a particular topic. While they are distinct processes, they are often conducted sequentially, with critical appraisal informing the selection and inclusion of studies in evidence synthesis. Together, critical appraisal and evidence synthesis play essential roles in evidence-based practice and research,
Literature reviews synthesize large amounts of information and present it in a coherent, organized fashion. In a literature review you will be combining material from several texts to create a new text – your literature review.
You will use common points among the sources you have gathered to help you synthesize the material. This will help ensure that your literature review is organized by subtopic, not by source. This means various authors' names can appear and reappear throughout the literature review, and each paragraph will mention several different authors.
When you shift from writing summaries of the content of a source to synthesizing content from sources, there is a number things you must keep in mind:
You can use a synthesis chart to help keep your sources and main ideas organized. Here are some examples:
California State University, Northridge. (2017). Literature Review How-To: Synthesizing Sources. Retrieved from https://libguides.csun.edu/literature-review/synthesis.
Before you begin to analyze and synthesize the articles you have selected, read quickly through each article to get a sense of what they are about. One way to do this is to read the abstract and the conclusion for each article.
It is also helpful at this stage to begin sorting your articles by type of source; this will help you with the next step in the process. Many papers (but not all) fall into one of two categories:
These are a selection of questions to consider while reading each article selected for your literature review.
Primary Sources:
Secondary Sources (ie. reviews)
Cronin, P., Ryan, F., & Coughlan, M. (2008). Undertaking a literature review: A step-by-step approach. British Journal of Nursing, 17(1), 38-43. Retrieved from: https://bit.ly/2wLeCge.
You are done with your literature review synthesis when :