The addition of a placebo control group to a research study with two experimental conditions:
A) Adds additional information
B) More precisely determines the relationship between the IV and DV
C) Changes the general design classification
D) a and b

Question

Quizplus · Accepted Answer

Adding a placebo control group can provide additional information about the effects of the treatment and more precisely determine the relationship between the independent variable and dependent variable. This does not change the general design classification but adds an important element to the study design.

The Addition of a Placebo Control Group to a Research