Sociology / Soc 0171 · Atom · ~20 seconds
Control and Experimental Groups
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The experimental group receives the treatment being tested; the control group does not, and exists to show what would have happened anyway.
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Within one office, employees are randomly assigned to the wellness program or the usual routine; the gap in sick days between the two groups is the effect.
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Without a control group, an improvement cannot be told from ordinary change.
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