ACT Preparation / Unit 20 ACT 1911 short lesson, about 20 seconds
Control Group Versus Controlled Variables
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The idea
The control group is a comparison group that receives no treatment or a standard one; controlled variables are conditions held constant for every group. The names are close; the ideas differ.
In practice
The white-light beans are the control group; equal water for all pots is a controlled variable.
Where people slip
A question about what was held constant asks for controlled variables, not the control group.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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