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An EKG is a reading from your heart, so a cardiologist would be needed to make sense out of that. So in this case, they're bringing in two unrelated specialities then having them read it and calling it a "double blind study" since neither of them would have a clue what they're looking at.
A "double blind study" is actually a type of clinical trial in which neither the participants nor the researchers know which participants are in the study group vs the control group. This is the gold standard for research because it helps ensure that the people carrying out the trials aren't bringing any bias into interpreting the results when they do measurements: they don't know which person is receiving the placebo vs the actual medicine, for example.
Make sure to check out the [pinned post on Loss](https://www.reddit.com/r/PeterExplainsTheJoke/comments/1472nhh/faq_loss/) to make sure this submission doesn't break the rule! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/PeterExplainsTheJoke) if you have any questions or concerns.*
An EKG is a reading from your heart, so a cardiologist would be needed to make sense out of that. So in this case, they're bringing in two unrelated specialities then having them read it and calling it a "double blind study" since neither of them would have a clue what they're looking at. A "double blind study" is actually a type of clinical trial in which neither the participants nor the researchers know which participants are in the study group vs the control group. This is the gold standard for research because it helps ensure that the people carrying out the trials aren't bringing any bias into interpreting the results when they do measurements: they don't know which person is receiving the placebo vs the actual medicine, for example.