Scientific article | Applied Sciences homework help

Please read the following article attached and answer in paragraph format the following questions. This is a discussion so I only need 400-450 words. 

What is the purpose of the study?

What is the independent and dependent variable?

What is the experimental question? What kind of experimental question is it?

Based on the Discussion section of this article, formulate an original experimental question that could be used as a follow-up study.

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