In a drug experiment, all participants are given the same instructions, and everyone gets a pill or injection with the participants in the experimental group receiving the experimental drug, and those in the control group receiving a placebo. Although the experimenter knows which subjects are in the experimental group and which are in the control group, the subjects themselves do not know who is
in which group or who received the real drug and who the placebo. This experimenter is using
a. a double-blind study to control for researcher bias.
b. a single-blind study to control for research participant bias.
c. random selection to control the extraneous variables.
d. random assignment to control the dependent variables.
B
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In adolescence, the rate of suicide is higher in
A) girls, and they attempt suicide more frequently. B) boys, and they attempt suicide more frequently. C) girls, although boys attempt suicide more frequently. D) boys, although girls attempt suicide more frequently.
If drugs are considered necessary to maintain one's emotional wellÂbeing, then which of the following exists?
a. a psychological dependence b. a situational dependence c. a physical dependence d. drug withdrawal