If the experimenter treats the experimental group differently than the control group,the experimental group might behave differently.This unwanted effect is called
A) experimental bias.
B) manipulation checks.
C) random sample.
D) placebo effect.

Question

Quizplus · Accepted Answer

Experimental bias occurs when the experimenter treats the experimental group differently from the control group, which can lead to differences in behavior between the two groups that are not the result of the independent variable being studied. This is an unwanted effect because it undermines the internal validity of the experiment by making it difficult to attribute any observed differences between the groups to the experimental manipulation itself. Manipulation checks are designed to ensure that the independent variable is indeed having the desired effect on the experimental group, while random sampling helps to ensure that the sample accurately represents the population to which the results will be generalized. The placebo effect refers to the tendency of people to experience improvement in symptoms or other outcomes simply because they believe they are receiving a treatment, regardless of whether the treatment is actually effective. While it is related to the issue of experimental bias, it is not the same thing.

If the Experimenter Treats the Experimental Group Differently Than the Control