While the results of Dr.Menger's experiment generalize to the real-world, but there were confounding variables in the study.This means Dr.Menger's research has:

Question

Quizplus · Accepted Answer

The presence of confounding variables reduces the internal validity of the study, as there may be other explanations for the results observed. However, the fact that the results can be generalized to the real-world suggests that the study has high external validity. Therefore, choice C is the best option.

While the Results of Dr