Andrea Lythgoe

Andrea has been a childbirth educator and doula for over 20 years, and really enjoys helping other birth professionals learn to better understand the research.

5 Kinds of Bad Data Visualization and how it can lead you wrong

Sometimes charts and graphs are designed in a way that is very misleading. Here are some examples, and explanations for what makes them misleading. Directional Disorientation This is a pretty famous bad graph that I have edited to remove the actual subject matter and protect the innocent. If you take a look at it, you …

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Research Trouble Spot 8: Sample isn’t representative

One thing that researchers sometimes do is to keep studies smaller in scope to minimize the scope and size. This is often a budgetary thing. So a study might be limited to first time parents with no complications. That’s normal and appropriate, but as a reader, we need to remember that those limited samples don’t …

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Research Trouble Spot 5: Correlation – Causation Confusion

It’s pretty common for people just starting to read research to confuse correlation (when two things seem to change together) with causation (when one thing causes another). Correlation can be a clue towards finding causation, but it is not the same thing. There are lots of reasons why two data points might be correlated without …

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