1. In the article titled: An Experimental Study on the Effectiveness of Multimedia in College English Teaching" that utilizes an experimental method. https://files.eric.ed.gov/fulltext/EJ1081502.pdf

Present the following for the article:

1. What is the dependent variable and the independent variable of the study?
2. Provide an overview of the experiment and a discussion of the results.
3. What type of experimental design used (Independent-groups, Within-groups, or Mixed);
4. Describe how participants were recruited and assigned to conditions?
5. How did the researchers manage threats to external and internal validity (if at all)?
6. PLEASE INCLUDE REFERENCE FOR FURTHER RESEARCH