本题目来源于试卷: IB Psychology HL Abnormal Psychology，类别为 IB心理学
[单选题]
Which research technique helps determine whethwjy(koxw;w inigf 3;2y +1j s9er a bv5mus 6gq73wz )(aw aviological treatment is successful simply because the patient believes they are being treated? z7gsauv3( qv6a wwm)5
A. Acclimation periods
B. Random allocation
C. Including a placebo group
D. Counterbalancing conditions
参考答案: C
本题详细解析:
Choices A and D describe techniques that reduce ordxcw:vk2t.q6-ihk. yawd+9i ger effects. Choice B reduces the chance that particiv2wk6hi k dtwi+a g.: .xcq-9ypant variability will influence the results of the study.
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