From Hilda Bastian at PLOS:
Here’s an example of what this means for a body of studies. I looked at this meta-analysis on changing implicit bias when l was researching for a recent blog post. It sounds like a solid base from which to draw conclusions: 427 studies with 63,478 participants.
But 84% of the participants are college students, 66% female, and 55% from the USA. They’re nearly all very short-term studies (95%), 85% had no measures of behavior in them, and 87% had no pre-test results. More.
In short, they might as well have been just three studies by profs who know each other.
See also: Peer review
Keep up to date with Retraction Watch
Follow UD News at Twitter!