Please answer the following questions based on the article.
How thorough was the review of the literature? What was the gap of the knowledge to be studied? Does the literature review support the need for the study?
Bias: Systematic error in the research process. Can be found in selection of subjects, instruments, or analysis. Can you discern any?
Confounding: other plausible reasons for the results. Are there any present that you can discern? Defend your answer.
Reactivity: subject changed from research and not the independent variable ( Hawthorne effect). Evident?

Quantitative reserach study