Multiple Choice
I assess your attitude toward marijuana,present you with a persuasive communication favouring liberalization of marijuana laws,and then reassess your attitude toward the drug.However,between assessment 1 and assessment 2,the President also advocates liberalization of marijuana laws.If I don't use a control group,any differences I observe are suspect on the grounds of
A) maturation.
B) history.
C) regression toward the mean.
D) testing.
Correct Answer:

Verified
Correct Answer:
Verified
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