The addition of a comparison group can address all of the following threats to internal validity EXCEPT:
A)History
B)Maturation
C)Regression
D)Attrition

Question

Quizplus · Accepted Answer

Adding a comparison group cannot address the threat of attrition because it pertains to the loss of participants over time, and a comparison group cannot control for this type of participant dropout. However, adding a comparison group can address the threats of history, maturation, and regression by providing a baseline for comparison and ensuring that any changes observed in the experimental group are not simply due to external factors or normal developmental processes.

The Addition of a Comparison Group Can Address All of the Following