Psychology / Unit 1 Psych 0095 short lesson, about 20 seconds
Experimental and Control Groups
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The idea
The experimental group receives the manipulation; the control group is treated identically except for the manipulation.
In practice
Both groups take the same test in the same room; only the assigned sleep duration differs between them.
Where people slip
A control group is not a group that gets nothing. It is a group that gets everything except the one thing under test.
Your place on the trail
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