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iosangel:

Which substance was the control in this experiment? https://prnt.sc/pbsskm

iosangel:

I think the control group would be like the one where it hasn't been touched or experimented with

iosangel:

but i dont know which it would be

JSVSL7:

You're right on with that definition but when it comes to categorical experiments, researchers normally use neutral and arbitrary things such as water or air. So here it's water.

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