In a nonequivalent control group design, which of the following occurs when the personal characteristics of the participants are confounded with the independent variable?
A) a history effect
B) biased selection
C) regression to the mean
D) low external validity

Question

Quizplus · Accepted Answer

Biased selection occurs when there is a systematic difference in the personal characteristics of participants in the experimental and control groups, which can confound the independent variable. This can lead to biased results and limits the generalizability of the findings. A history effect refers to external events that may influence the outcome of the study, regression to the mean refers to the tendency for extreme scores to become less extreme with repeated measurement, and low external validity means that the results cannot be generalized to other populations or settings.

In a Nonequivalent Control Group Design, Which of the Following