Hi Tara shiny felt for UAB School of Medicine in this video I'm going to discuss one the major threats to the validity of a systematic review namely publication bias I'll discuss what publication bias is and give a very general overview of ways that we can try to detect its presence before we get started with this video I really want to make a disclaimer that this is a very general overview of publication bias and not met for systematic reviewers to get an in-depth discussion of methods used to detect and analyze for publication bias so publication bias is just one type of reporting bias and I'd like you to pause this video review this slide and see some of the different things that affect the decision to publish or not publish a study that go beyond what editorial boards consider when you've done restart the video so don't you find it interesting that there's lots of different things that go into decision of publishing a paper publication bias is just one of them so what is publication bias so really it's the tendency to submit or accept a study depending on the studies results and largely what it means is that positive studies tend to get published more than negative studies and some people call this the file drawer problem where studies that are negative or not as strong as the researchers were like never get submitted for publication they're stuck in a file drawer never to see the light of day so there's a couple of studies that have shown evidence of publication bias I'd like to show you here this is one review that looked at the publication rates of significant versus non significant results and these are a variety of studies that each analyzed...
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