Experimental and Control Groups
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The experimental group receives the manipulation; the control group is treated identically except for the manipulation.
Show
Both groups take the same test in the same room; only the assigned sleep duration differs between them.
Watch for
A control group is not a group that gets nothing. It is a group that gets everything except the one thing under test.