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In a double-blind study,
A) participants are assigned randomly to both the control group and the experimental group.
B) the experimenter manipulates neither the independent variable nor the dependent variable.
C) both the experimental group and the control group receive placebos.
D) neither the observer nor the participants know which group is the experimental group and which is the control group.
Double-blind Study
A double-blind study is a research design in which neither the participants nor the experimenters know who is receiving a particular treatment, to eliminate bias.
Experimental Group
The group in an experiment that receives the variable being tested, as opposed to the control group.
Control Group
A group in an experiment that does not receive the experimental treatment and is used as a benchmark to measure how the other tested subjects do.
- Distinguish between different experimental controls and their purposes (e.g., double-blind study).
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Learning Objectives
- Distinguish between different experimental controls and their purposes (e.g., double-blind study).
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