What are they?

Knowing what is known about a topic before setting out to investigate it is crucial to contextualize research findings in light of previous research. There is a possibility that evidence can be selectively cited if people are not aware of existing evidence. As a result, the vast majority of new research is not preceded or followed by literature reviews.  

An evidence map is a tool that aims to capture the diversity and distribution of research across various study designs, outcomes, and populations related to a given topic. By mapping the existing evidence landscape, decision-makers, policymakers, and researchers can better understand the strength and gaps in evidence, making informed choices about resource allocation and research priorities.