In a study comparing learning condition on knowledge acquisition, participants are randomly assigned to one of the two learning conditions - collaborative group learning or traditional lecture/discussion method.

What is the independent variable in this study?

What is the dependent variable in this study?

Is the independent variable manipulated or is it a participant / subject variable?

What type of research method(descriptive, predictive, quasi-experimental, or experimental)? is used in this study?

What is a potential confounding variable in this scenario? You must justify your answer to earn points on this question.