4 ms·
"performing studies with fifteen people" The study only shows that blood flow to your brain drops when you are sitting for a long period of time. So I think 15
by pasta 8y ago
"performing studies with fifteen people"
The study only shows that blood flow to your brain drops when you are sitting for a long period of time. So I think 15 people is a huge sample in this case.
The study doesn't even has any conclusions. So I think 15 people is fine.
The next step could be gathering data from thousands of people to check weather this causes brain damage in any form. But that's not what the study was about. Only the title of the article suggests this.
- cryoshon 8y agochiming in to agree here. for something along the lines of basic organ system operation like blood flow, you need only a small sample to show that there is an effect. example: a sample of 12 people would be more than enough to prove that people bleed if they are cut. you could look at a sample of 10k people just to be sure -- but you're not going to learn anything new. the experimental measurement of the variable is too high level. the point of this study is to corroborate past research and provide another avenue of future investigation. if a future study finds that the inverse is true, we now have reason to be suspicious of that study's conclusions.