The effects of a placebo are compared to the effects of the actual independent variable on the experimental group. The placebo control group serves as a check for practice effects and expectancy effects.

Question

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The statement is true. A placebo control group helps to determine whether any observed effects are due to the independent variable or to factors such as participant expectations or practice. By comparing the results of the experimental group to those of the placebo group, researchers can determine the specific effects of the independent variable.

The Effects of a Placebo Are Compared to the Effects