Researchers sometimes find that subjects in the experimental group seem more motivated than the subjects in the comparison group,which leads to greater drop out from the comparison group.This is known as ______.
A)demoralization
B)placebo effect
C)differential attrition
D)selection bias

Question

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The Answer of Researchers sometimes find that subjects in the experimental group seem more motivated than the subjects in the comparison group,which leads to greater drop out from the comparison group.This is known as ______.
A)demoralization
B)placebo effect
C)differential attrition
D)selection bias

Researchers Sometimes Find That Subjects in the Experimental Group Seem