A device that was implanted into the brains of people with traumatic brain injuries substantially improved their cognitive function a year later, a small study suggests
Not what I mean. I meant they tested the 6 people before and after who did have the implants and it showed improvement.
They should have tested a group of regular people two times as well, at the same time. Ones with no surgery before or after, to see if they also showed improvement in the testing.
Most everyone gets better at something the more times they do it. Even taking a test. If the control group also showed an 18% improvement the 2nd time taking the test, it would mean the implants didn’t do anything.
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Not what I mean. I meant they tested the 6 people before and after who did have the implants and it showed improvement.
They should have tested a group of regular people two times as well, at the same time. Ones with no surgery before or after, to see if they also showed improvement in the testing.
Most everyone gets better at something the more times they do it. Even taking a test. If the control group also showed an 18% improvement the 2nd time taking the test, it would mean the implants didn’t do anything.