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.

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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Research Trouble Spot 3: No Control Group

Experimental studies that show something is safe or improves outcomes should, by definition, have something to compare the new treatment against. If they don’t, it’s hard to know if the new treatment is a better option or not. Control groups can come in several varieties: No Treatment Group – Researchers would compare the outcomes with …

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