If participants in the experimental group and control group differ significantly, this may threaten the _____ of the study.

Question

Quizplus · Accepted Answer

Internal validity refers to the degree to which you can be confident that the changes in the dependent variable were due to the manipulation of the independent variable and not some other factor. If the participants in the experimental and control groups differ significantly, it means there are other variables that may have affected the outcome, making it difficult to determine if the independent variable caused the change.

If Participants in the Experimental Group and Control Group Differ